Little known scientific knowledge.

Unknown medical knowledge 1. What are the unknown medical secrets?

Where did your health knowledge come from? Some healthy lifestyles known in medicine may not be fully disclosed. Look at the following 20 medical secrets summarized for you.

1. The medical secret of fruit acid. Fruit acid can help digestion. If you have indigestion, I encourage you to eat a fruit after dinner. But if you have a good digestive function, eating fruit after meals may actually help.

Because it takes two hours or even longer for food to be digested after entering the stomach, fruits, especially hard fruits, such as apples and pears, will stay in the stomach for a long time, which not only increases the burden of digestion, but also reacts to produce gas, causing bloating. So I suggest you eat fruit 1 0~2 hours after meals.

The medical secret of fasting physical examination requires fasting, but it doesn't mean that you haven't eaten since the night before, so the physical examination results are inaccurate. My suggestion is to have a light diet the night before the physical examination. Of course, don't drink, coffee or strong tea, skip breakfast, drink less water and do no physical exercise on the morning of the physical examination.

3. Medical secrets of myopia surgery Not everyone is suitable for myopia correction surgery, unless you have worn myopia glasses or contact lenses for more than one year before surgery. If you wear glasses when you take them off, you must tell the ophthalmologist, and it is best not to have myopia orthopedic surgery in the near future, otherwise it will affect the doctor's judgment on your corrected vision.

4. Medical secrets of sunglasses It is very important to wear sunglasses to protect your eyes from various eye diseases such as cataracts, especially when the sun is strongest between 10 and 4 pm. In the specific choice, it is not the more expensive the lens or the darker the lens, but whether the lens is marked with blocking 100% ultraviolet rays.

Don't just choose beautiful frames. While ignoring the quality of the lens.

5. Don't worry about the medical secret of natural childbirth, which will lead to the loosening of * * *. There is no basis for being out of shape.

* * * is almost the most elastic muscle in your body. Even if you bleed slightly during childbirth, you can recover quickly. As for the worry about the figure, as long as you don't supplement nutrition too much during pregnancy, you won't go out of shape, but you can still reshape yourself after childbirth.

More importantly, natural childbirth can prevent many gynecological diseases in women. Doctors encourage natural delivery, and cesarean section is only an auxiliary means. 6. Medical secrets of cesarean section As an obstetrician, I know the disadvantages of cesarean section better than anyone else.

Compared with the uterine contraction pain of natural delivery, the wound after cesarean section is more painful, and the mother and son will suffer because they can't get out of bed within 24 hours after cesarean section and can't give milk until 3 days later. The degree of uterine contraction pain is different for every woman, and some even feel that it is not very painful. What movies and TV plays show belongs to artistic exaggeration.

For natural childbirth, confidence is the most important thing. At the moment the child is born, all the pain and discomfort will be replaced by great happiness. 7. Medical Secrets of Virus Infection A large part of patients infected by virus are actually polluted by "second-hand houses".

It is understood that less than 10% of homeowners will disinfect their houses when renting them, while mites, cold viruses, hepatitis B viruses, measles viruses and molds can survive in their houses for a long time at room temperature. If you move in winter, you should pay more attention, because these viruses and bacteria will live longer at low temperatures.

Therefore, it is very important to disinfect the house in the early stage before moving into the newly rented house. Walls, beds, sinks and toilets can't be missed, especially if professionals are asked to clean and disinfect the air conditioner. 8. Medical secrets of hair dyeing Although hair dyeing is directly related to blood diseases, there is no medical statistical data to prove it. According to my experience, if you dye your hair more than four times a year, you will have dizziness and migraine, and then the possibility of thrombocytopenia will be much higher than that of people who don't dye your hair. Some people's white blood cells will be significantly reduced, which means that their immunity will be reduced.

9. the medical secret of drinking water is that drinking water is not as much as possible. In theory, drinking more water can help the kidneys to detoxify and reduce the burden on the kidneys. However, you should know that the human body is a tight balance system, and the adult kidney can only excrete 800~ 1000 ml per hour. If you drink more than 1000 ml in an hour, it will lead to hyponatremia and affect kidney health. So don't exceed 1000 ml at a time and1000 ml per hour.

10. Digital Syndrome Long-term use of computers, frequent texting, and long-term driving will make your wrist nerves oppressed and damaged. If you feel pain in your wrist, elbow or shoulder, it is possible that your nerves are damaged.

If this situation is left unchecked, with the growth of age, the pain will become heavier and heavier. Therefore, don't be careless, it is best to go to the hospital for microsurgical diagnosis and treatment in time.

1 1. acupuncture weight loss, the medical secret of acupuncture is not effective for everyone. Because acupuncture weight loss's principle is * * * related acupoints, reduce appetite, so as to achieve the purpose of losing weight.

Therefore, if you usually eat a lot and are simply overweight, then choosing acupuncture weight loss will have a good effect. However, if you don't eat much at ordinary times, it is because of endocrine disorders that lead to obesity. It is best to go to the endocrinology department for examination.

12. Secret physical therapy is becoming more and more popular, and many muscle injuries caused by exercise are treated by this non-drug method. In China, many undergraduates and postgraduates are engaged in this work.

But if I go to see a doctor, I will still choose the old head nurse who is the head nurse in the clinic. Although not so highly educated, but very experienced, physical therapy is an empirical subject. Some people need such treatment, and some people can't use this technique. Meaningless, knowledge can't explain it at all. Although the graduate degree is high, but the clinical time is not long enough, sometimes it is difficult to judge, but the old nurse can quickly judge the correct treatment according to experience.

13. Medical secrets of B-ultrasound In foreign countries, B-ultrasound doctors have special allowances, because radiation is more or less harmful to the body. The "hidden rule" of pregnant mothers in China is usually to have a B-ultrasound examination every month after 3 months.

However, during the baby's neural development, any slight influence may cause harm to his future. So my advice is that pregnant women should not do B-ultrasound more than three times, and.

2. What are the simple and common medical tips in life?

Raw materials for treating cold (1): 50g of japonica rice, appropriate amount of onion and appropriate amount of sugar.

Method: cook the japonica rice first, and when the japonica rice is about to be cooked, add 2~3 stems of chopped green onion and sugar. Usage: 65438+ 0 times a day.

Warm your clothes and bring some sweat. Efficacy: relieving exterior syndrome and dispelling cold, harmonizing stomach and tonifying middle energizer.

Suitable for cold and cold. (2) Wash 20 peanut shells and 3 scallions (with whiskers) with clear water, put them in a pot, add appropriate amount of cold water, boil and fry for 15 minutes, filter out the soup, drink it while it is hot, and add clothes and quilts in time to make the head and body slightly sweaty.

If accompanied by vomiting and nausea, you can add 4 slices of ginger to this recipe and fry it. If you have a sore throat and cough at the same time, add some pears when decocting in water.

(3) Take 3 slices of onion 100g and ginger and take them with decoction or boiled water. You can also use 20 grams of onion, 5 slices of ginger, sugar 1 spoon, a pinch of tea and water 1 bowl.

(4) Pear 1 piece, ginger 25g, all cut into thin slices, added with 1 bowl of water, decocted and taken once, effective on the same day. (5) 25 ml of wine, put it in a pot to boil, evaporate the alcohol, add 1 egg, and add 1 spoon of sugar.

Dilute with boiling water when taking, and then cover with a quilt to rest. The next day, symptoms such as nasal congestion, runny nose and sore throat can be obviously alleviated or disappeared. Some people can take effect once they have a cold. I haven't done the experiment. I found this. I hope I can help you.

3. What are the simple and common medical tips in life?

Original publisher: Meng Buding Song

Daily life medical tips 1, often eat supper. You'll get stomach cancer. Because the stomach can't rest. You can only eat four eggs a week. Eating too much is bad for your health. 3. Chicken contains carcinogens. It's better not to eat. It is a wrong idea to eat fruit after meals. It should be eating fruit before meals. 5. Girls should not drink green tea during menstruation. No tea anyway. Eat more things that can replenish blood. 6. Drink soy milk without eggs and sugar. Don't drink too much. 7. Don't eat tomatoes on an empty stomach. It's best to eat after meals. 8.wake up in the morning. Drink a glass of water first. Prevent stones. 9. Don't eat three hours before going to bed. You will gain 10, and drink less milk tea. Because it is high in calories and oil, it has no nutritional value. If you drink it for a long time, you are prone to diseases such as hypertension and diabetes. 65,438+065,438, freshly baked bread is not suitable for immediate consumption. Stay away from the charging stand. People should stay away from the bedside for more than 30 cm. Never put it on 13. Drink eight glasses of water 14 and ten glasses of water a day. Bladder cancer will not come 15, drink plenty of water during the day. Drink less water at night 16, and don't exceed two cups of coffee a day. Drinking too much is easy to insomnia and stomachache 18. And concentrate the blood in the brain on the stomach. It's easy to fall asleep after 5 pm. Eat less big meals, because you don't need so much energy after five o'clock. There are 19 and 10 foods that will make you happy: deep-sea fish, bananas, grapefruit, whole wheat bread, spinach, garlic, pumpkin, low-fat milk, chicken and so on. People who have the habit of taking a nap will not get older by 2 1, and the best sleep time is from 10 in the evening to 6: 22 in the morning. Don't drink more than one glass a day, because alcohol will inhibit B cells that make antibodies and increase the chance of bacterial infection. 23. Take the capsule with cold water (you can eat it first) and take the medicine 30 minutes before going to bed. Avoid lying down immediately. 24. Sour plum has the function of preventing aging and keeping young forever. People who are full of anger should eat more 2.

4. Medical knowledge

Moxibustion and nose washing are good for health. Traditional Chinese medicine believes that the lungs are enlightened by the nose.

It means that the ventilation and olfactory function of the nose mainly depend on the function of lung qi, which is harmonious and conducive to breathing, so that the sense of smell of the nose can be sensitive. When the cold wind blows in winter, many people keep sneezing, clearing their noses, and have symptoms such as sore throat and cough.

In order to prevent sneezing, itchy nose and colds, you can often rub your nose. The way to rub your nose is to rub E5a48de588B6E79Fa5E98193313332636434 with the outside of your thumb. When you feel hot, rub the outside of your thumb on both sides of the bridge of the nose and up and down the alar for about 30 times.

Then * * * Xiang Ying point 15~20 times on both sides of the alar (Xiang Ying point is 0.5cm beside the lateral edge of the alar). Manipulation from light to heavy, be careful not to damage the skin.

You can do it once before getting up in the morning and before going to bed at night, and you can do it in other free time. This method can dredge channels and collaterals, strengthen local blood circulation, greatly enhance the cold resistance of nose, effectively prevent colds and nasal diseases, and can also treat colds and nasal congestion.

Nose washing We breathe through our noses every day and breathe in a lot of dust, bacteria, sulfur dioxide and other waste gases and viruses in the air. As the first pass for the human body to deal with air, the nose is always troubled by dirty air.

Although nasal mucosa has a certain filtering and cleaning function, if you wash your nose frequently, you can remove the dry scab in the nasal cavity in time, so that the nasal cavity can play a better filtering and cleaning function. The way to wash your nose is to hold warm water or warm salt water in your palm, lower your head and inhale gently through your nose, then blow it out through your nose, and repeat it several times.

You can also hang the warm saline bottle high and connect it with the infusion tube, with the nozzle extending into the nasal cavity for 2~3 cm, and rinse it at the same time. Wash your nose with cold water all year round, especially when you wash your face in the morning. Washing your nose several times with cold water can improve the blood circulation of nasal mucosa, enhance your nose's adaptability to weather changes and prevent respiratory diseases.

In addition, we should correct bad habits such as picking nose, plucking nose hair or cutting nose hair, because damaging nose hair and nasal mucosa will not only affect the filtering function of nose, but also cause bacterial infection in nasal cavity, and may also cause intracranial and ear diseases. Children should not eat more bubble gum: the plasticizer in bubble gum contains trace toxins, and eating bubble gum often has an impact on children's physical development and health.

Popcorn: Children are interested in popcorn, especially in rural areas. However, popcorn contains more lead. When lead enters children, it will damage children's nervous system and hematopoietic function, and make children mentally retarded and anaemic.

Jelly: Jelly is made of essence, thickener, colorant and sweetener. Eating more jelly often not only affects children's growth and development, but also affects IQ.

What's more dangerous is that children smoke too fast and accidentally enter the trachea, which will lead to cough caused by foreign bodies in the bronchus, or block the bronchus and lead to suffocation and death. Cold drinks: Cold drinks are also made of the above substances. In addition to affecting IQ, children often eat cold drinks, which will reduce local resistance and disease resistance, and children often catch colds; In addition, drinking cold drinks often will affect the secretion of digestive juice, making children lose appetite and indigestion.

Chocolate: This is because chocolate contains substances similar to caffeine, which can excite the nerves. It can make children extremely excited, their heart rate increases, it is difficult to fall asleep, and even cry and move more. Mutton kebabs: After being smoked, mutton kebabs will produce a strong carcinogen-benzopyrene, which will make children stunted and have low immune function, and may also induce cancer if eaten frequently.

Pickled vegetables: all kinds of pickled vegetables, such as bacon, salted eggs, pickled fish, pickles, etc., contain dimethyl nitrate. After these substances enter the human body, they will be transformed into carcinogens such as dimethylnitrosamine and propionaldehyde. Children eat more and often these foods, which not only affects digestive function, but also may induce cancer. Instant noodles; Instant noodles are delicious and children like them very much, but they contain preservatives and food pigments, which hinder children's growth and development and affect their memory and attention.

Salt: Children's diet should be light, not too salty. Too much salt in children will weaken the body's resistance and make it easy to catch a cold.

This is because salt (sodium chloride) can inhibit the activity of respiratory bacteria and hinder the disease resistance of bacteria. At the same time, saliva secretion decreases, lysozyme in the mouth decreases correspondingly, and cold virus takes the opportunity to make waves, leading to a cold. What is a good medicine? People often say, "you can't get good medicine when you go to the hospital."

Some people call doctors to prescribe "good medicine" regardless of the specific conditions of their own diseases, always thinking that cheap medicine can't cure the disease. So what kind of medicine is a good medicine? In fact, a good medicine is neither new, expensive nor imported, as long as it is safe, efficient, cheap and convenient to take.

■ Not much medication, but accurate. Make a clear diagnosis and prescribe the right medicine; Drugs should not be used indiscriminately, but should be targeted.

■ Some new drugs sold in the market are actually the ingredients of some old drugs, but their names, packaging and dosage forms have been changed, and they have been dubbed "foreign names". ■ The effectiveness of treating diseases mainly depends on whether symptomatic drugs are used, and whether the treatment scheme and medication are reasonable.

The curative effect does not depend on whether expensive drugs, new drugs or imported drugs are used. Domestic and imported drugs are effective as long as they are qualified products that meet the drug quality standards.

■ There are more and more people taking over-the-counter drugs now, and over-the-counter drugs are not absolutely harmless. When people buy and use drugs by themselves, they must have safety awareness, strengthen the study of popular science knowledge, read the drug instructions carefully, use drugs according to symptoms, follow the contraindications of drug use, and try to avoid blind combination of drugs.

5. What little common sense are there in life?

Often eat midnight snack, you will get gastric cancer, because the stomach can't rest.

You can only eat four eggs a week. Eating too much is harmful to your health.

Chicken contains carcinogens, so it is best not to eat it. It is wrong to eat fruit after meals, but eat fruit before meals. Drink soy milk without eggs and sugar, and don't drink too much.

Don't eat tomatoes on an empty stomach, it is best to eat them after meals; Drink a glass of water to prevent stones when you wake up in the morning. Drink eight glasses of water every day and bladder cancer will not come; Drink more water during the day and less water at night. Don't eat three hours before going to bed, you will get fat; Eat a balanced diet every day and don't overdo it; Keep your ideal weight, but be fat. Drink less milk tea, because milk tea has high calories, high oil content and no nutritional value. If you drink it for a long time, you should also reduce foods that are prone to diseases such as hypertension and diabetes, such as salt, smoking and baking. Stay away from the charging stand, the human body should be more than 30 cm, and don't put it by the bed.

Girls should not drink green tea during menstruation. No tea anyway. Eat more things that can replenish blood.

Do not drink more than two cups of coffee a day. Drinking too much can easily lead to insomnia and stomachache. Eat less greasy food, because digestion takes 5~7 hours, and the blood in the brain is concentrated in the gastrointestinal tract, which makes it easy to fall asleep.

Eating fresh fruits and vegetables every day is refreshing! Eat less big meals after five o'clock in the afternoon, because your body doesn't need so much energy after five o'clock.

6. What are the unknown mysteries of the human body?

What are the potential mysteries of the human body?

One of the main differences between humans and apes is that humans are suitable for walking upright on two feet. In this way, human hands are no longer walking organs, but can be used to make and use tools.

Many morphological and structural features of human beings are related to upright walking. The National Library of Medicine is the largest medical library in the world, storing more than 3 million pieces of human medical information.

In fact, just the appearance of the human body has many unexpected health mysteries. Here are some little-known human mysteries.

1. Please don't stick out your tongue if you don't want to reveal your identity. Just like fingerprints, everyone has their own unique tongue lines.

2. The human body loses about 600,000 skin cells every hour. Before the age of 70, each person shed an average of 47.6 kilograms of skin debris.

3. Adults have fewer bones than babies. People are born with 350 bones. With the growth of age, some bones twisted into one, leaving only 206 bones.

4, people's gastric mucosa is replaced every three or four days, otherwise gastric acid will digest the stomach!

Human nose is not as sensitive as dog's nose, but it can still remember 50 thousand smells.

6. The length of an adult's small intestine is about four times the height. If we don't go through circuitous overlapping, our abdominal cavity can't hold it at all.

7. There are 4.96 million bacteria attached to every square centimeter of skin, but fortunately most of them are harmless bacteria.

Sweat odor is the chief culprit of foot odor and underarm odor. There are 500,000 sweat glands in human feet, and at least 0.57 liter of sweat flows out every day.

9. People sneeze faster than160km/h.. So when you feel like sneezing, cover your nose quickly.

10, the human blood vessels can reach 96,000 kilometers from end to end, and the heart needs to transport 76,000 liters of blood every day.

1 1. People spit out an average of 28,000 liters of saliva in their lifetime, which is enough to fill two swimming pools.

/kloc-before 0/2 and 60 years old, 60% of men and 40% of women snore. The average loudness of snoring is 60 decibels, which is similar to talking.

13, hair color determines hair density, and each hair follicle cell can grow 20 hairs. Blonde people have an average of 654.38+046 million hair follicle cells; There are about 1 10000 black hair; There are about 65438+ ten thousand people with brown hair; There are about 86,000 redheads.

14, nails are 0.25cm long every month. Fingernails grow faster than toenails. Frequently used hands have the fastest nails.

7. What are some useful but unknown tips?

Drying orange peel as a pillow helps you sleep.

Rubber gloves can be depilated by rubbing the carpet with water.

Boiling water and baking soda can remove water stains.

Stick plastic wrap on the kitchen wall to isolate oil stains.

Add some detergent to get rid of oil when washing clothes.

Put a bottle of water in the toilet tank to save water.

Adding some eggs to the dough is more powerful.

Add a little sugar to make dough quickly.

Add a little baking soda to the dough to make it soft.

It is cleaner to mop the floor with detergent.

Green umbrella nozzle connected with mineral water bottle can water flowers.

Cut it and add hemp rope to make a mineral water bottle flowerpot.

Wet clothes dry quickly and there is a lot of room in the middle.

Cooking noodles with a little salt is more powerful.

Mineral water bottle? Scissors can be used as a mobile phone holder.

Putting orange peel in shoes can get rid of peculiar smell.

The clothes in the suitcase cannot be folded.

Condoms can be used for waterproof dressing.

You can use condoms to waterproof your mobile phone in rainy days.

Toothpaste with a little baking soda can remove tooth stains.

The spare chain of the fuel tank is not long enough, so the auxiliary guide chain can be removed.

8. Seek medical knowledge, the more the better.

Regular sleep, not staying up late, even eating, eating less meat and more vegetables, not picky about food, having a fixed exercise time every week, not having physical strength to do anything well, will also affect your thinking, and not taking medicine for minor illnesses, such as catching a cold, can completely make you feel happy, calm, irritable and impulsive. The best time for sunbathing is from 8 am to 65: 438+00 pm.

At this time, the sunlight is mainly the beneficial ultraviolet A beam, which can make the human body produce vitamin D, thus enhancing the anti-tuberculosis and osteoporosis prevention ability of the human immune system and reducing the incidence of arteriosclerosis. 2, the best time for beauty, the skin's metabolism is the most vigorous from 24 o'clock to 6 o'clock the next morning. Therefore, it is best to use beauty and skin care cosmetics before going to bed at night, which can promote metabolism and protect skin health.

3, the best time to brush your teeth 3 minutes after a meal is the best time to rinse your mouth and brush your teeth. Because oral bacteria begin to decompose food residues at this time, the acidic substances produced by them are easy to corrode and dissolve enamel and damage teeth.

4. The best time to drink tea for health is after eating 1 hour. Many people like to drink hot tea immediately after meals, which is very unscientific.

Because tannic acid in tea can combine with iron in food to form insoluble iron salt, which interferes with the absorption of iron by human body and can induce anemia over time. 1. If you eat spicy food and think it will kill you, just put a little salt in your mouth, hold it and rinse your mouth, so it won't be spicy; 2. Yellow teeth, you can chew peanuts in your mouth and brush your teeth for three minutes, which is very effective; 3. If there is a small area of skin damage or burns, immediately apply a little toothpaste to stop bleeding and relieve pain; 4. Always leave ugly tea stains in the cup filled with tea, and wash it with toothpaste, which is very clean; 5. Open your mouth slightly when you look up at the eye drops, so that your eyes will not blink; 6. If there is an ulcer in the mouth, stick it on the ulcer with vitamin C, and it will basically be fine after the ulcer dissolves; 7. Small dust enters your eyes, close your eyes and cough a few times, and the dust will come out by itself; 8. After washing your face, gently apply some fine salt on both sides of your nose with your fingers, and then rinse with water, so that blackheads and acne will be removed and pores will become smaller; 9. When you have just been bitten by a mosquito, it doesn't itch when you apply soap; 10. If the throat and gums are inflamed, cut the watermelon into small pieces at night and eat with salt. Remember that it must be at night, when the symptoms will be relieved and the next day will be fine; 1 1. The hair dryer blows at the label, and when the glue of the trademark is hot, the label is easily torn off; Lots and lots. Go and see for yourself.

9. Health knowledge of middle school students

First, wash your hands before and after meals: the hand is the "diplomatic organ" of the human body and plays a leading role in everyone's "foreign affairs activities". You need to use your hands to complete the investigation made by scientists. An unwashed hand contains at least 40,000 to 400,000 bacteria.

Nail seam is a good place for bacteria to hide. One nail seam can hide as many as 3.8 billion bacteria. The flu virus can survive for 7 days on wet and warm hands.

So, my hands are dirty. Moreover, when traveling, visiting and studying, and performing tasks, hands often touch some items and get dirty.

Especially patients with infectious diseases and those who seem to be in good health, often spread pathogenic microorganisms to various articles and appliances. As soon as a healthy person's hand touches it, pathogenic microorganisms will come to your hand. Washing hands can remove bacteria and eggs attached to hands. Washing your hands with tap water can wash 80% of the bacteria off your hands. If you wash with soap first and then tap water, you can wash 99% of the bacteria off your hands. Second, don't vomit: everyone will vomit, but not everyone has a good way to vomit.

Some so-called "health lovers" spit sputum on the ground and wipe it clean with shoes, thinking that it will be clean if you can't see sputum. I didn't know that sputum contained millions of bacteria, viruses and fungi.

People with respiratory diseases, such as tuberculosis, influenza and meningitis, have more bacteria and viruses in their sputum, which is the case with SARS. Millions of mycobacterium tuberculosis can be found in one mouthful sputum of tuberculosis patients.

If you spit on the ground and the sputum is dry, bacteria will fly into the air with the dust, and healthy people may get respiratory diseases by inhaling such dust. So we should form a good habit of not spitting.

Sputum should be spit in the spittoon, which should be scrubbed regularly every day. Where there is no spittoon, the spittoon should be wrapped in waste paper and thrown into the wastebasket or dustbin to avoid spitting and maintain the hygiene of public places.

3. Don't cough or sneeze at others: If you don't pay attention to the occasion, sneezing in front of others or food is an unhealthy bad behavior. According to the survey, a cough can eject 20,000 tiny droplets, and a sneeze can eject nearly 654.38+0 billion droplets.

Moreover, the speed of droplet ejection is very fast, and it can fly 4.6 meters in less than 1 s, and it can fly 9 meters with the wind. The nasal cavity and throat are one of the places with the densest bacteria and viruses, and the sprayed droplets contain a lot of bacteria and viruses.

A sneeze can spit out 85 million bacteria. These tiny water droplets can float in the air for a long time, 30-60 minutes in a windless room, and up to 30 hours. Among the legal infectious diseases in China, 15 is airborne (such as chicken pox, mumps, mycoplasma pneumonia, etc. ).

Therefore, for everyone's health, we should pay attention to politeness and hygiene when coughing and sneezing. 4. No smoking: Smoking is harmful and useless, which is recognized by the scientific community all over the world.

Tobacco smoke contains more than 3000 kinds of harmful substances. Among them, there are mainly nicotine (nicotine), cigarette tar, light hydrofluoric acid, acrylic acid, carbon monoxide and so on.

Nicotine is a toxic substance. Tobacco tar contains nitrosamines, phenols, arsenic, radioisotopes and other carcinogenic or carcinogenic substances, especially benzopyrene, which is recognized as a strong carcinogen. According to statistics, the incidence of lung cancer in people who smoke 40 cigarettes a day is 70 times higher than that in non-smokers.

In addition, smoking is closely related to laryngeal cancer, esophageal cancer and gastric cancer. Smoking can promote the development of systemic arteriosclerosis and hypertension, so the incidence and mortality of cardiovascular and cerebrovascular diseases of smokers are higher than those of non-smokers.

In addition, smokers are prone to bronchitis, bronchitis and emphysema. Some people say that smoking can refresh oneself and improve work efficiency, which is a misunderstanding.

Modern medical research believes that, therefore, people who smoke heavily for a long time lose their balance in the process of excitation and inhibition of cerebral cortex, but instead show decreased memory, distraction and work efficiency. The incubation period of many smoking-related diseases is very long, and it is not as fast as eating highly toxic substances.

So in a short time, people often can't see his harm. Sometimes it takes decades from smoking to death.

This is also the main reason why people don't know enough about the harm of smoking. There are about 200-300 million smokers in China, accounting for more than15 of the national population and10-0/0.2 billion smokers in the world. Not only will it consume a lot of money every year, but many years later, the state and individuals will invest unimaginable money to treat various diseases caused by smoking.

At present, European and American countries have seen the great harm of smoking and used legal, economic and political means to greatly reduce the smoking rate of the masses. For example, American law clearly stipulates that selling cigarettes to teenagers under the age of 18 will be severely punished and even prosecuted to the court.

Newspapers also published complaints from local people in Europe and the United States about the harm that tobacco companies and advertising agencies have done to themselves and their families. At present, China is still in the process of reform and opening up, and some laws are not perfect. Some departments also use cigarettes as a magic weapon to create huge profits. Young people regard a cigarette in their hand or mouth as a sign of maturity, and even some women have joined the ranks of smokers now.

A famous foreign scholar predicts that about 50 million young people under the age of 20 will die of smoking in China in the future. So at present, many people think that smoking is a public hazard, a plague in 2 1 century, and opium in the new century, which harms the Chinese nation.

5. Don't drink too much: Modern medical research shows that when the alcohol concentration reaches 0.6%, it often leads to death. The harm of drunkenness is systemic and the consequences are quite serious. A Chinese scholar dissected 47 corpses that died of drunkenness and found that all the corpses had extensive internal congestion, especially congestion, edema and bleeding of gastric and duodenal mucosa, and some gastrointestinal mucosa could be necrotic.

Many scholars have pointed out that heavy drinking will lead to a high degree of cerebral cortex inhibition, inhibition of respiratory and circulatory centers, leading to respiratory arrest, which is a common cause of death for drunkards. Do not drink unclean water, eat raw fruits and vegetables should be washed or peeled, do not urinate anywhere, do not litter.