What sentences describe Ruan Heng's expression and movements when he draws blood?

After a silence, a small hand trembled and raised. Suddenly it was put down and then lifted. "-RuanHeng was thinking and hesitating when he was silent; Tremble "and" put down "because of fear of blood donation and death; Lift it up again to save a friend's life and insist on donating blood.

"When donating blood, zhongruan didn't move and didn't say a word."-Ruan Heng was nervous because of special fear when donating blood, but he tried not to show it.

"He suddenly sobbed, shaking all over, and quickly covered his face with his other hand." -Ruan Heng couldn't help but fear that he would die in the process of donating blood; But in order not to affect blood donation, I tried my best to hide my fear and pain.

"He began to sob again and tried to hide his pain with his hands again." When Ruan Heng thought that he was going to die, he cried in the pain of fear, but he still tried to hide it to save his friend's life.

"His sobs from time to time turned into a constant low voice crying. He closed his eyes and bit his fist with his teeth, trying to stop sobbing. "-with the progress of blood, RuanHeng thought his blood must be running out, dying. His fear and pain are becoming more and more difficult to hide, but he is still trying to hide it for his good friend's sake.

"The boy stopped crying at once, as if nothing had happened just now." When the boy knew that blood donation was not life-threatening, he behaved very calmly and might feel a little embarrassed for his performance just now.