贫血是青少年时期的常见病，是当今世界各国普遍关注的营养缺乏性疾病。据文献报道，在发展中国家营养性贫血患病率高达３０％～９０％，发达国家为１０％～３０％，尤其婴幼儿和青春发育期青少年患病率最高［１］，严重危害青少年的身体健康。为了解郑州市中小学生营养性... Anemia is a common disease in adolescence and is a common deficiency in the world today. According to the literature, the prevalence of nutritional anemia is as high as 30% -90% in developing countries and 10% -30% in developed countries, especially in adolescents and adolescents [1], which seriously endanger young people Healthy body. To understand the nutrition of primary and secondary students in Zhengzhou ...