Objective To test the hypothesis that greater purpose in life is associated with a reduced risk of AD.

目的：为了验证人生目标越高与罹患ad的风险越低具有相关性的假说。

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In life you'll realize there is a purpose for everyone you meet some will test you, some will use you, and some will teach you But most importantly, some will bring out the best in you.

生活中，你会发现每个所遇到的人，都有其意义所在。有的人会考验你，有的人会利用你，有的人会指导你。而有的人会激发出最优秀的你，这才是最重要的。

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