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Researchers have found that peoples' mental abilities peak at 22 before beginning to deteriorate just five years later。 研究人员发现，人的智力在22岁时达到顶峰，而仅在五年之后就会开始衰退。 Professor Timothy Salthouse said the results suggested that therapies designed to prevent or reverse age-related conditions may need to start earlier, long before people become pensioners。 蒂莫西·索尔特豪斯教授称，研究结果表明，旨在预防或扭转与年龄有关的症状的治疗应尽早开始，而非等到退休。 Almost half of over 50s 'unaware of leading cause of blindness'" Results converge on a conclusion that some aspects of age-related cognitive decline begin in healthy, educated adults when they are in their 20s and 30s," he said。 在50岁以上的人中，有近一半的人“不清楚导致智力衰退的主要原因”。蒂莫西称，研究发现，对于身体健康，受过教育的成年人来说，与年龄有关的一些认知衰退症状在二三十岁时就开始了。 The study of 2,000 men and women lasted over seven years. The respondents, aged between 18-60, were asked to solve visual puzzles, recall words and story details and spot patterns in letters and symbols。 该研究持续七年之久，共对两千名18岁至60岁之间的男性和女性进行了调查。研究人员要求调查对象做图形猜谜，复述单词和故事细节，以及指认字母和符号类型等各项测试。 | 
