A lecturer was giving a lecture to his students on stress management. He raised a glass of water and asked the audience, ‘How heavy do you think this glass of water is?’

    All of the students tried to answer the question, and their answers ranged from 20g to 5OOg.

 ‘It does not matter on the absolute weight. It depends on how long you hold it. If I hold it for a minute, it is OK. If I hold it for an hour,l will have an ache in my right arm. If I hold it for a day, you will have to call an ambulance. It is exactly the same weight, but the longer I hold it, the heavier it becomes.’

  ‘If we carry our burdens all the time, sooner or later, we will not be able to carry on, because the burden is becoming increasingly heavier.’

   ‘What you have to do is to put the glass down, rest for a while before holding it again.’

    We have to put down the burden periodically（定期地；周期性地），so that we can be refreshed and are able to carry on. Otherwise I think that we will break down on the half way and can’t realize our dream as we planned.All of us should really keep this in mind.

    Before you return home from work tonight, put the burden of work down. Don’t carry it back home. You can pick it up tomorrow.

   Whatever burden you are having now on your shoulders, let it down for a moment if you can. If you do like this, you can greatly improve your work efficiency（效率） and life quality.

    Life is short; let’s enjoy it to the fullest.

根据短文内容完成表格，一空一词。