[简答题]Britain’s most prestigious scientific institution, the Royal Society, will host a meeting for some of the world’s top psychologists. Their aim is to find out why it is that some people’s lives go so right. What is it that makes them happy and fulfilled, while others seem doomed to founder in misery, dissatisfaction and dejection Psychologists have known for some time that optimism is a good defense against unhappiness.“If you are optimistic and you think life is going to get better, it will become a self-fulfilling prophecy,” says Baylis. “You will involve yourself more, you will take more care of yourself. You will figure that if you do more exercise and not booze as much, life will be better.” Positive psychologists believe optimism can be learned, and we can teach ourselves to see a half-empty glass as half-full.“Research on depression shows that one of the biggest causes of depression is ruminating about something that went wrong in the past,” says Baylis.“What happens is

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