佝偻病是一种常见于婴幼儿的慢性营养不良病。现在大多数人都知道这种病是由于维生素D不足而使钙、磷的代谢障碍,钙盐不能正常地沉着在骨骼的生长部位,以致骨髂发生病变。維生素D主要含于肝、奶及蛋黄之中,尤其是鱼肝油含量最丰富,一旦孩子摄入不足,就会患病。除食物外,人体内的维生素D是利用日光的照射而得到的。因此,孩子的室外活动太少或大气污染严重的地区尘埃烟煤阻止了紫外线的通过,都可成为维生素缺 Rickets is a chronic malnutrition that is common in infants and young children. Most people now know that this disease is due to inadequate vitamin D and calcium and phosphorus metabolism disorders, calcium salts can not normally calm in the growth of bone sites, resulting in bone and iliac lesions. Vitamin D is mainly contained in the liver, milk and egg yolk, especially the most abundant content of cod liver oil, once the children lack of intake, will be sick. In addition to food, the body of vitamin D is the use of sunlight irradiation. Therefore, the children’s outdoor activities too little or bad air pollution in areas of dust bituminous coal to prevent the passage of ultraviolet light, can be a lack of vitamins