应用１∶３配比病例对照研究浙江省海岛肝癌高发区洞头县居民饮食方式与原发性肝癌发病的关系。调查发现海岛居民肝癌发病与食用被污染甲壳类海产品如虾蛄干、虾蛄、鲜虾皮和螃蟹等有较密切关系，苹果、桔子、西瓜则为保护因子。提示保护环境，少食甲壳类海产品，多食绿色食品可能有助于降低肝癌发病率 A 1:3 matching case-control study was conducted to investigate the relationship between dietary patterns and the incidence of primary liver cancer in residents of Dongtou County, a high-incidence area in Zhejiang Province. The investigation found that the incidence of liver cancer in island residents is closely related to the consumption of contaminated crustacean seafood such as dried shrimp, dried shrimp, fresh shrimp and crab, while apple, orange and watermelon are protective factors. Tips to protect the environment, eat less crustacean seafood, eat more green food may help reduce the incidence of liver cancer