The term “late sleep obsessive-compulsive disorder” became popular as soon as it was invented-it really has a mass base. 　　I work at a university. Today’s students hardly fall asleep before 12 o’clock in the evening. Mostly dawdling, lying on the bed and playing with mobile phones. They don’t want to go to bed so late, they don’t think mobile phones are fun, and they don’t even remember what they played. Looking back afterwards, most of them are regretful. Some students are in a hurry to write a thesis, but they really can’t write it. They make up their minds: “Let’s go to bed early today, wake up tomorrow with energy,…