根据短文内容，按要求答题。

　　Can feeling of nostalgia(怀旧)be good for you?Or is it unhealthy to have a strong love for the past?

　　For years, medical experts(专家)have studied nostalgia and the reasons for it．Many experts say that too much nostalgia is harmful．They also say living in the past shows that a person is unhappy with his present life．These feelings keep the person from living his life to its fullest．

　　However, experts say it is normal to love the past sometimes．In fact, a little nostalgia can enrich a person's life．

　　Dr Louise Kaplan has written several books about nostalgia．She says these feelings often begin when a young person is between 13 and 19 years old．

　　“This is the time when you must face the loss of your childhood,”Kaplan says．“You see your life is easily destroyed．But you think about a golden past．You remember your childhood as a time when life was perfect(完美)．These feelings continue as a person gets older．”

　　Kaplan says these feelings are not always actually existing(存在)．The good old days weren't always good．However, she says nostalgia can be helpful, if used properly．

　　“Feeling of nostalgia can cause you to remember a time when you had high hopes and dreams,”Kaplan says．“It might give you the strong wish to catch those dreams today, in your present life．”She adds that nostalgia can prevent you from cutting yourself off from you aim．

1．What does this article talk about?

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2．What is the good point if we have a little nostalgia?

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3．What is the weak point if we have too much nostalgia?

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4．Why do teenagers often have the feelings of nostalgia?

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5．Translate the sentence“Feeling of nostalgia can cause you to remember a time when you had high hopes and dreams．”into Chinese．

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