At the beginning of the text, the author raises 3 questions About happiness. I think it （改that)may be that（刪掉） people always hold these kinds of notions; also, the questions can invite(arouse 可能好點)the readers’ attention.
Then the author lists different concepts, which are held by different people in order to emphasize the importance of scientific pursuit and analysis. Then, at the end of the text, he makes a conclusion that (is how)to know whether person is happy, his traits and relationship with others will give us better clues.
To sound extend, I agree with the author's (viewpoint.)in my opinion, happiness is a kind of sense of feeling, it depends on our attitudes，activities，and priorities engender a sense of well-being. To be exact, it is a conscious choice we make every day of our lives.
