人们常说:养生三大事,一睡眠,二便利,三饮食。可见,睡眠对人的健康多么重要。一般情况下,人的一生有1/3时间是在睡眠中度过的。其中初生儿需要20小时,1周岁儿童需要13～14小时,3岁儿童需要12小时,小学生需要10小时,初中生需要9～10小时,高中生需要8～9小时,成年人需要8小 People often say: three major health issues, a sleep, two conveniences, three diet. Visible, sleep on human health is so important. Under normal circumstances, one-third of a man’s life is spent during sleep. Among them, it takes 20 hours for newborns, 13-14 hours for children aged one, 12 hours for three-year-olds, 10 hours for primary students, nine to ten hours for junior high school students, eight to nine hours for high school students and eight hours for adults