1、饮食以植物性食物为主。蔬菜、水果、谷类、豆类应占总食量的2/3以上,每人每天应吃400-800克蔬菜、水果;600-800克各种谷类、豆类食物。新鲜绿叶蔬菜、胡萝卜、土豆和柑桔类水果防癌作用最强,不过要常年坚持,才具有防癌作用。2、不饮酒或限制饮酒。成年男性一天不超过2杯,女性不超过1杯(1杯的量相当于250毫升啤酒。100毫升果酒或125毫升白酒)。3、限制肉类食品。每天猪、牛、羊等“红肉”要少于90 1, diet mainly plant foods. Vegetables, fruits, grains and beans should account for more than two-thirds of the total food intake. Every person should eat 400-800 grams of vegetables and fruits per day; 600-800 grams of cereals and beans. Fresh green leafy vegetables, carrots, potatoes and citrus fruits have the strongest anti-cancer effects, but they must persist for many years before they have anti-cancer effects. 2, do not drink or limit alcohol. Adult males do not exceed 2 cups a day, and women do not exceed 1 cup (a quantity of 1 cup equals 250 milliliters of beer, 100 milliliters of fruit wine or 125 milliliters of white liquor). 3, limit meat foods. Every day pigs, cattle, sheep and other “red meats” are less than 90