我国0～14岁儿童智能低下的患病率为1.02％,其中相当部分是先天性、遗传性代谢疾病引起的,如能在出生初期得到明确诊断,并给予有效治疗,其智能发育有可能基本达到同龄儿童水平,但这类患儿在出生时并无异常表现,一般要到3～6月龄才逐渐出现疾病临床症状,故在早期易被忽视,一旦发现为时已晚。新生儿疾病筛查已在我国逐步开展起来,用简便的方法对全部新生婴儿进行普查,以便及早发现某些先天 The prevalence of mental retardation among children aged 0-14 in our country is 1.02%. A considerable part of them are caused by congenital and hereditary metabolic diseases. If they can get a definite diagnosis early in their birth and be given effective treatment, their mental development may be basically Reach the same age children’s level, but such children have no abnormal performance at birth, usually until 3 to 6 months of age clinical symptoms of the disease gradually appear, it is easy to overlook in the early, once found too late. Neonatal disease screening has been gradually carried out in our country, with a simple method for all newborn babies census, in order to detect some of the innate