If you are worried about things and are under a lot of stress at work or school, then you are probably not sleeping well. Worry can keep you awake, tossing and 【26】______ in bed until the early hours 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 and lack of sleep are directly 【32】______ . Dr. Winkle says, ' the more we worry, the 【33】______ we sleep, the more 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 need in order to keep healthy 【37】______ a lot. Seven hours is about the average amount, 【38】______ strangely enough, sleeping longer often gives you a headache 【39】______ of making you feel mom refreshed. Dr. Winkle believes that preparing for sleeping is important. People who work late should try to give themselves a short 【40】______ and do something restful before going to bed. This could be watching TV or listening to music. Doing some exercise 【41】______ in the day should help you to feel physically as well as 【42】______ tired. A bedtime drink can also help, but coffee or tea should be avoided 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 your feet, and you'll be asleep 【45】______ you know it.' 【26】