维生素D缺乏性佝偻病是危害婴幼儿身心健康的常见病。据1986年全国普查,佝偻病发病率平均高达40.6％,为探索早期而有效地预防措施,从提高食品营养入手,借鉴国外发达国家30年来的成功经验,结合我国国情,我们选用在新鲜牛乳中强化适量维生 Vitamin D deficiency rickets is a common disease that endangers infants and young children’s physical and mental health. According to the 1986 national census, the incidence of rickets was as high as 40.6% on average. In order to explore early and effective preventive measures, starting with improving food nutrition and drawing on the successful experiences of developed countries over the past 30 years in light of China’s national conditions, we selected to strengthen in fresh milk Adequate maintenance