A. they think they should have done B. you have done nothing
C. people try and tell you they are not so bad D. someone just said to me
E. it's a time to remember the things
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Birthdays are strange things. The more you have, the more you try and pretend they don't matter, and the more ____ . I’m not really sure why they think so. It's true that you are getting older, but as ____ , “Who isn't getting older every day?” The problem may be that a birthday reminds people of all the things ____ , but have not. I certainly understand that feeling, though I think ____ that I most want to do — a kind of personal re-ordering (重新排序) of the to-do list. What makes you depressed(郁闷) on your birthday is that you realize your re-ordered to-do list is exactly the same as it was last year. That makes you feel____ , and not been anywhere. I have not had that experience this year. I look back at where I was last year and find things have changed since then.
=(x1,y1)、
=(x2,y2)，则
｜=
)、
x1x2+y1y2=0