癌症是威胁人类身心健康的头号杀手。据世界卫生组织统计,全球每六秒钟就有一人死于癌症,每年全世界癌症死亡人数高达五百万。西方医学家将癌症的主要致病因素分为两大类:一类是环境中的有害物质,如空气、水的化学污染,滥用农药等;另一类是不良的生活方式造成的。如吸烟、饮酒、生活没有规律等。 进入二十世纪以来,肺癌的发病率和死亡率不断 Cancer is the number one killer that threatens human physical and mental health. According to statistics from the World Health Organization, one in every six seconds in the world dies of cancer, and the number of cancer deaths worldwide is as high as five million each year. Western medical scientists divide the main pathogenic factors of cancer into two categories: one is harmful substances in the environment, such as air, water, chemical pollution, abuse of pesticides; the other is caused by poor lifestyle. Such as smoking, drinking, life is not the law. Since the beginning of the 20th century, the incidence and mortality of lung cancer have continued