我们地区在处寒冷的北方。由于多种原因所致维生素D缺乏性疾病多见,成为本地区影响小儿骨骼发育的重要因素。为了探讨维生素D治疗的关键时间,现将1987年至1990年四个春季观察治疗40例维生素D缺乏性疾病患者的体会介绍如下。临床资料:①对象:40例患者分为四组进行观察。A组患儿10例,为6～8个月的婴儿。以手足搐搦症为主诉,乳齿未长出,无其它骨骼著症。B组患者20例,为7～9个月的 Our region is cold north. Due to a variety of reasons due to vitamin D deficiency diseases more common, has become an important factor affecting the development of bone in children in this region. To discuss the key timing of vitamin D treatment, the experience of treating 40 patients with vitamin D-deficiency disease during the four spring 1987-1909 observations is now described below. Clinical data: ① object: 40 patients were divided into four groups for observation. A group of 10 children, 6 to 8 months of infants. The main complaint of tetany, temper no growth, no other skeletal disease. B group of 20 patients, for 7 to 9 months