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精神发育迟滞(MR)是危害儿童身心健康较严重的常见病。在我国发病率农村1.4％,城市0.7％.为避免引起MR的高危因素,降低MR的发生率。
Mental retardation (MR) is a common disease that endangers children’s physical and mental health. In China, the incidence of rural 1.4%, urban 0.7% .In order to avoid the risk of causing MR risk factors, reduce the incidence of MR.