题目内容：
Energy Cycle(能量周期)Do you find getting up-in the morning so difficult that it is painful？ This might becalled laziness, but Dr．Kleitman has a new explanation．He has proved that everyone hasa daily energy cycle．
During the hours when you labor through your work you may say that you are "hot"．
That is true， The time of day when you feel most energetic is when your cycle of bodytemperature is at its peak．For some people the peak comes during the forenoon．For others it comes in the afternoon or evening．No one has discovered why this is so, but it leadsto such familiar monologues ( 自言自语) as: “Get up， John！ You’ ll be late for work again！” The possible explanation to the trouble is that John is at his temperature-and-ener-gy peak in the evening．Much family quarrelling ends when husbands and wives realizewhat these energy cycles mean, and which cycle each member of the family has．
You cannot change your energy cycle, but you can learn to make your life fit to it better．Habit can help, Dr．Kleitman believes．Maybe you're sleepy in the evening but feelyou must stay up late anyway．Counteract (对抗) your cycle to some extent by habituallystaying up later than you want to．If your energy is low in the morning but you have an important job to do early inthe day, rise before your usual hour．This won't change yourcycle, but you'll get up steam (鼓足干劲) and work better at your low point．
Get off to a slow start which saves your energy．Get up with a leisurely yawn andstretch．Sit on the edge of the bed a minute before putting your feet on the floor．Avoidthe troublesome search for clean clothes by laying them out the night before．Wheneverpossible, do routine work in the afternoon and save tasks requiring more energy or concentraion for your sharper hours．If a person finds getting up early a problem, most probably A．he is a lazy person
B．he refuses to follow his own cycle
C．he is not sure when his energy is low
D．he is at his peak in the afternoon or the evening
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