碘影响儿童智力的发育,我国是世界上碘缺乏病流行最严重国家之一,坚持普及碘盐是持续纠正人群碘营养缺乏的唯一有效途径。延安市属于碘缺乏病重度流行区,自20世纪70年代开始推广碘盐,至1995年全市各县区实现了普供碘盐。为了解全民普及碘盐 Iodine affects the development of children’s intelligence. China is one of the most serious iodine-deficiency epidemic countries in the world. Insisting on popularization of iodized salt is the only effective way to continuously correct the lack of iodine nutrition in the population. Yan’an City belongs to the severe epidemic area of ​​iodine deficiency disease. Since the seventies of last century, iodized salt has been promoted. By 1995, all the counties and districts in the city have achieved universal iodized salt. To understand the universal popularization of iodized salt