2、1. Sleep and Your Life / Stress and Sleep / Sleep Is Important

2. People who work late should try to give themselves a short break and do something restful before going to bed.

3. stress / worry and （lack of） sleep are directly related/have direct/close relation

4. Seven hours is about the average amount, though strangely enough, sleeping longer often gives you a headache instead of making you feel more refreshed.

5.当你醒来时，你不但没有感到精力充沛，反而疲惫不堪，难以应对新的一天。