The story is about a young girl named Yang Liu. She was ill, because she couldn't sleep well. Every night, she felt very tired, but she stayed awake  . Soon Yang Liu went to see a doctor, "I just can't get to sleep at night. What should I do?""Count   from 1 to 1,000. By the time you reach 1,000, you can be asleep  . I hope you feel better soon," said the doctor. The next day Yang Liu came back to the doctor's office. She still looked tired. "Well," said the doctor, "how are you feeling today?" "I tried counting one, two, three... up to one thousand. But when I reached seven hundred and eighty-nine, I began to feel sleepy  . I had to get up and drink some coffee so that I could go on counting up to one thousand. After I finished counting all the numbers I still couldn't fall asleep," she said. What did the doctor ask Yang Liu to do?
To take some medicine. To read some books. To count numbers. To drink some coffee.