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２．５营养本研究所采用的膳食调查表，是根据Ｂｌｏｃｋ等人［５］提出的，可表明每一组主要食物（蛋白质、乳制品、蔬菜、水果、谷物制品）摄入份数平均值的简易方法，经过适当修改而成。按照Ｂｌｏｃｋ等人使用的程序进行统计，最后将各组食物均折合成每天的摄入份数（Ｓｅ?
2.5 Nutrition The dietary survey used in this study was based on the findings of Block et al. [5] and shows the average intake of each of the main foods (protein, dairy, vegetables, fruits, cereal products) Easy way, made with appropriate changes. In accordance with the procedures used by Block and other statistics, and finally each group of food are folded into daily intake of copies (Se?