时值夏季,正是教师的繁忙时刻。这时教师们常常要熬夜备课、批改作业和试卷。 夏季,天气炎热,人的消化能力减弱,吃不好,睡不足,营养跟不上,身体消耗大,易发生头昏脑胀现象。此时,熬夜时间不宜太长,切忌超过二十四点。因为每天保持有六小时睡眠,才能保证第二天有充沛的精力。睡眠太少了,大脑细胞未能恢复到正常水平,白天就会头昏脑胀,疲乏无力。 任何劳动都要消耗能量。脑力劳动的能量来源主要靠血糖。熬夜时间长了,血糖便减少而不能维持大脑细胞的机能活动,就会出现注意力不集中,头脑发胀或疲乏无力等症状。夜晚工作时间长了应离开座位,散散步,再吃些诸如鸡蛋、牛奶、肉松、豆制品、瓜果等营养品,但量不宜多,以免影响睡眠。当全身和大脑 During the summer, it is the teacher’s busy hour. At this time, teachers often have to prepare lessons day and night, marking assignments and papers. In summer, the weather is hot, people’s digestive ability is weakened, eating is not good, lack of sleep, nutrition can not keep up, the body is consumed, prone to dizziness. At this time, the time of day and night should not be too long. Never exceed twenty-four. Because we maintain six hours of sleep every day, we can ensure that there is plenty of energy the next day. Sleep is too little, brain cells fail to return to normal levels, and they feel dizzy and tired during the day. Any work must consume energy. The source of energy for mental work depends mainly on blood sugar. Longer day and night, when blood sugar is reduced and the function of the brain cells cannot be maintained, attention will be lost, and the brain may be swollen or fatigued. If you work long hours at night, you should leave your seat, take a walk, eat some other nutritional products such as eggs, milk, pork, bean products, fruits, etc., but the amount should not be too much, so as not to affect sleep. When the whole body and brain