Nowadays, most people are lacking of sleep, because part of them like to hang out at night and then stay up, or some of them are asked to work overtime.
Nowadays, with the development of technology, many young people stay indoors and play computer all the time. Especially for those who stay up very late or go out to play for fun until midnight, then t
Nowadays, it is the common situation for the young people to stay up, some are addicted to the computer games, and some are going out and find fun with their friends.