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陕西省克山病与大骨节病患区主要分布在铜川以北,延安以南的子午岭和黄龙山山区,以及渭北的林由山区和黄土残塬区。从患区的外环境可以看到,在那些属于森林草原地带、植被良好的次生林区,苍郁闭塞的还原环境,以及有机物质相对富集的土壤和水源,就容易发生克山病和大骨节病。
The areas of Keshan disease and Kashin-Beck disease in Shaanxi Province are mainly distributed in the areas north of Tongchuan, Ziwuling and Huanglong Mountain south of Yan’an, and the areas of Linyi Mountain and Loess Plateau in Weibei. From the external environment of the affected area, it can be seen that Keshan disease and Kaschin-Beck disease are prone to occur in those secondary forest areas which belong to the forest grassland zone and whose vegetation is good, the reducing environment with a clumpy blockage and the relatively rich organic matter and soil and water sources .