Why do smartphones attract people’s attention?

I think the main reason is that mobile phones are fast-stimulating and visual-oriented, and the rewards are very fast. When you play with mobile phones, dopamine is secreted very quickly and you get a lot of pleasure. When I read a book, it depends on what kind of book I am interested in. After I finished reading the book that I was interested in, I was still thinking about it in my dreams. After I woke up, I was very tired and my brain was so active that I couldn’t stop all night long (people with ADHD are not very good at it). Good control of brain activity). If you don’t like books, it’s easy to understand that you should study for the sake of studying. Fat people hate exercise to lose weight. There is no fun at all, only infinite pain. What they need is perseverance and concentration. Can they do it without a reward mechanism? I insist on doing utilitarian things (I have several academic friends who say that they don’t like studying but they work hard to get the first place. One is an undergraduate from Tsinghua University and a Ph.D. from Harvard. I, who love some knowledge, cannot insist on doing things I don’t like and have ADHD. Procrastination is just common 211). Doing something you don't like is really exhausting.