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徐汇区是上海市的一个住宅区,居民的经济、文化水平比较高。1954～1983年三十年来居民的健康水平不断提高,期望寿命逐年增长。资料及方法
Xuhui District is a residential area in Shanghai. The residents’ economic and cultural level is relatively high. From 1954 to 1983, the health level of residents has been continuously improved and life expectancy has increased year by year. Information and Methods