e spleen and the stomach digest food. If someone spends the entire day without sleep, it is difficult to recover the loss.”Р清代医家李渔曾指出:“养生之诀,当以睡眠居先。睡能还精,睡能养气,睡能健脾益胃,睡能坚骨强筋。?♦ LiYu, a physician in the Qing Dynasty , once said,“The secret of keeping good health is having good sleep. Because sleep can Huanjing, nourish Qi, strenghen spleen and tonify stomach and make bones strong.РMarch 21stРWorld Sleep DayРPromoting growth and development of human body?Eliminating fatigue?Refection?The best way of detoxificationРThe necessity of sleepРDo you have a good sleep?РHow many hours do you sleep per day on average?РA. Over 8 hours B.6 to 8 hours? C.4 to 6 hours D. Less than 4 hoursРDo you suffer from insomnia at night?? A. Never B. Sometimes? C. Always D. Every nightРCollege students stay up late for