Li Ming studies in a high school, and this is his second year. In order to get improved as soon as possible, he decided to study late every night. Usually, he would go to sleep about 11 o’clock, but the pressure made him couldn’t sleep well, so he kept study until 12 o’clock. A month passed, Li Ming realized that he didn’t make progress, instead, he lag behind. He talked to his teacher and the teacher told him that he needed to rest well and took it easy. Only the student slept well would he have the energy to study and focus on his attention. Li Ming did as the teacher said, indeed. It worked, he made progress and he could thought quickly. Sleeping well is the very important way to improve study efficiency. 
李明是一名高中生，今年他高二了。为了尽快得到提高，他决定每晚都学到很晚。通常情况下，他11点钟就去睡觉了，但是，压力使他睡不着，所以他一直学习到12点钟。一个月过去了，李明意识到他没有取得进步，相反，他落后了。他跟他的老师交流了下，老师告诉他，他需要休息好，放松点。只有休息得好，才会有精力去学习，集中注意力。李明照老师说的去做了，事实上，确实奏效了，他取得了进步，思维转得也快。睡眠好是提高学习效率非常重要的方法。

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