地理流行病学（续）张见麟（接５期）２土壤与微量元素：一般人类与其所处化学环境是平衡的。外环境中某些元素贫乏或过剩，可导致地方病的发生。最典型的例子是碘与地方性甲状腺肿的关系。这种病常见于元素易淋溶的灰化土地带高山，河谷，沙土、沼泽地区。我国学者根据碘... Geographical Epidemiology (cont.) Zhang Jianlin (No. 5) 2 Soil and trace elements: Generally speaking, human beings are in balance with the chemical environment in which they live. Some elements of the external environment, poor or surplus, can lead to endemic diseases. The most typical example is the relationship between iodine and endemic goiter. This disease is common in the elements of leaching ash area easily alpine, valleys, sand, swamp areas. Chinese scholars based on iodine ...