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维生素Ａ缺乏是发展中国家儿童常见的营养问题 ,是引起儿童失明的主要原因。截止2 0 0 0年底尚无高原地区代表性的数据资料 ,为填补这一空白 ,初步掌握我省 5岁以下儿童的血清维生素Ａ水平 ,于 2 0 0 0年 1 1月下旬在西宁、民和、同仁三地进行了调查研究。资料与方法1 抽样及
Vitamin A deficiency is a common nutritional problem in children in developing countries and is the leading cause of blindness in children. As of the end of 2000, there is no data on the representativeness of plateau areas. To fill this gap, we initially got a preliminary grasp of the serum vitamin A level in children under 5 in our province. In late January of 2000, And, my colleagues conducted a survey of three places. Data and methods 1 sampling and