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早在1775年,英国外科医生波特就指出,人类患癌是接触环境的结果。目前已知,气象、地理、土壤、水源、地球化学、动植物生态均可影响人类癌症的发病率。癌自环境来,首先表现在癌症具有明显的地域特征。据调查,在干旱,半干旱的山区和丘陵地区食道癌发病率较高;在热带、亚热带沿海潮湿多雨地区肝癌发病率较高;年平均气温低于16℃的一些谷地,伯基特
As early as 1775, Porter, a British surgeon, pointed out that human cancer is the result of exposure to the environment. It is now known that meteorology, geography, soil, water, geochemistry, flora and fauna can affect the incidence of human cancer. Cancer from the environment, first manifested in cancer with obvious geographical features. According to the survey, the incidence of esophageal cancer is higher in the arid and semi-arid mountainous and hilly areas; the incidence of hepatocellular carcinoma is higher in humid and rainy coastal areas in the tropical and subtropical regions; in some valleys where the annual average temperature is lower than 16 ℃,