经过研究,证实在生活中大致有7种致癌因素:(1)抽烟。长期抽烟的45—64岁的男性,其肺癌、喉癌、胰腺癌和膀胱癌的发病率要比不抽烟者高2—8倍;(2)酗酒。尽管少量饮酒对身体威胁不大,但酗酒者癌症的发病率肯定要高于一般人;(3)阳光。紫外线是造成皮肤癌的主要原因,皮肤癌一般易在头面、耳、颈和手背等直接暴露于紫外线的部位发作;(4)性行为。性关系发生过早、过频的妇女易患宫颈癌,30岁以后才生孩子或终生不孕妇女易患乳腺癌;(5)职业。长期大量接触某种矿物质和化合物的人,癌 After research, it has been confirmed that there are roughly 7 carcinogenic factors in life: (1) smoking. Long-term smoking of 45-64-year-old men, the incidence of lung cancer, laryngeal cancer, pancreatic cancer and bladder cancer than non-smokers are 2-8 times higher; (2) alcoholism. Although small amounts of alcohol do not pose a serious threat to the body, the incidence of cancer among alcoholics is definitely higher than that of ordinary people; (3) Sunshine. Ultraviolet rays are the main cause of skin cancer, and skin cancer is usually easy to occur on the head, ears, neck, and back of the hands directly exposed to ultraviolet rays; (4) sexual behavior. Women who have had sexual relations prematurely and frequently have a tendency to develop cervical cancer. A child born after age 30 has a child or a lifelong infertile woman who is susceptible to breast cancer. (5) Occupation. People who have long been exposed to a certain amount of minerals and compounds, cancer