问题详情：
What should you do if you are not able to sleep? The best thing is to try to avoid bad habits. 61 you always go to bed and get up at about the same time，this will set a 62 (health) rhythm in your life．Don’t drink caffeine drinks in the evening．Smoking and alcohol can also keep you awake. You may have trouble 63 (sleep) if you have a heavy meal just before you go to bed．
You may also find it difficult 64 (get) to sleep if you have a problem or something else on your mind．This is 65 you need to relax．As you lie in bed，tense the muscles in your feet and then relax 66 ．Continue up the body，tensing and relaxing the muscles until you reach the head. Start with the feet again if you are still tense．If you 67 (think) about a problem or about something exciting that is going to happen the next day，get up and write about it．That will help to take it off your mind．You can also get up and read，but be sure to choose 68 book that is not too difficult． 69 ，you may get so interested that you won’t want to go to sleep even when you feel sleepy．
Sleep well and have sweet 70 (dream)!
【回答】
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