If you are worded about things and are under a lot of stress at work or school, then you areprobably not sleeping well．Worry can keep you awake, tossing and__26__in bed until the earlyhours of the morning when you eventually __27__asleep．When you wake up, you don' t feel__28__, but tired and worn out and__29__to face a new day．
Dr．Henry Winkle, in a recent newspaper article__30__stress and Sleep,__31__that stress andlack of sleep are directly__32__．Dr．Winkle says, "the more we worry, the__33__we sleep, themore we are unable to deal with__34__If we can find a way to get a good night' s sleep," he__35__,"we can often find the__36__to deal with what' s worrying us．"
So, what is a good night' s sleep？ Research shows that the amount of sleep which people needin order to keep healthy__37__a lot．Seven hours is about the average amount,__38__strangelyenough, sleeping longer often gives you a headache__39__of making you feel more refreshed．
Dr．Winkle believes that preparing for sleeping is important．People who work late should tryto give themselves a short __40__and do something restful before going to bed．This could bewatching "IV or listening to music．Doing some exercise__41__in the day should help you to feelphysically as well as__42__tired．A bedtime drink can also help, but coffee or tea should be avoi-ded as they contain caffeine (咖啡因 ) and will keep you __43__．" When you put the light__44__," Dr．Winkle says, "concentrate on relaxing your muscles．Working slowly up from yourfeet, and you' ll be asleep__45__you know it．"
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