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一般认为,大多数癌症(60～90％)主要是由外界环境因素引起的。膳食是人们天天接触的外环境物质,它和癌症之间的关系很值得研究。从我国各种癌症的发病情况来看,虽有地区差别,但大多数以胃癌或食管癌为最多,肝癌及结肠癌往往占第三或第四位。也就是说,以消化道癌症最为多见,这是应注意膳食与癌症有无关系的另一原因。虽然外环境因素在致癌方面可起很大的作用,但外因
It is generally believed that most cancers (60-90%) are mainly caused by external environmental factors. Meal is the outer environment material that people contact with every day, and its relationship with cancer is worth studying. From the incidence of various types of cancer in our country, although there are regional differences, but the majority of gastric cancer or esophageal cancer is the most, liver cancer and colon cancer often account for the third or fourth place. In other words, the most common gastrointestinal cancer, which should pay attention to diet and cancer is another reason. Although external environmental factors can play a significant role in cancer, but the external cause