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在我国西南、西北地区的一些地方,常常流行这样一种怪病:第一代大脖子,第二代小个子,第三代是傻子。经过研究,科学家发现这种病是由于体内缺少碘元素造成的。1979年,科学家对72个国家进行调查统计的结果显示,由于缺碘而引起的甲状腺肿大(俗称大脖子病)和呆小症(即个子矮小
In some places in southwestern and northwestern regions of our country, such strange diseases are often prevalent: the first generation of big neck, the second generation of small children and the third generation of fools. After research, scientists found that the disease is due to the lack of iodine in the body caused. In 1979, scientists conducted a survey of 72 countries, the results of the survey showed that due to iodine deficiency caused by goiter (commonly known as big neck disease) and cachexia (that is,