保证足够的睡眠时间是很重要的。人体经过一天的紧张工作、学习和生活,到晚上睡眠时,体内新陈代谢速度减慢,各组织器官处于休息、恢复的状态。睡眠能保护大脑机能,解除疲劳,使人保持旺盛的精力和体力。睡眠不足,注意力就不易集中。日本研究人员研究发现,人缺觉4小时;反应能力就会下降45％。研究认为,1986年美国航天飞机“挑战者”号发生爆炸事故的原因,就是因为发射“挑战者”号做准备的工作人员睡眠不足。同一年,前苏联切尔诺贝利核电站发生事故更是因为职员困倦到了极点所致。加拿大一位教授所做的一项调查表明,春天少睡一个小时,交通事故增加7％;秋天多睡一个小时,交通事故减少7％。这表 It is important to ensure adequate sleep time. After a day’s stressful work, study and life, the body’s metabolism slows down at night, and the organs of the tissues are in a state of rest and recovery. Sleep can protect the brain function, relieve fatigue, make people maintain strong energy and physical strength. Insufficient sleep, attention is not easy to focus. Japanese researchers found that people lack of sleep 4 hours; response ability will drop 45%. According to the research, the cause of the 1986 U.S. space shuttle Challenger explosion was due to lack of sleep during the preparations for the Challenger. In the same year, the accident at the Chernobyl nuclear power plant in the former Soviet Union was caused by the drowsiness of staff. According to a survey conducted by a Canadian professor, an hour less sleep in spring and an increase of 7% in traffic accidents; an additional hour of sleep in fall and a 7% reduction in traffic accidents. This table