1 癌症是可预防的吗?绝大部分人类癌症是由环境因素引起的,其中最重要的因素是吸烟、膳食和相关因素(如体重和体力活动),以及工作场所和其它地方的致癌因素。人们是否会患癌取决于暴露于这些环境因素的强度以及个体的敏感性(遗传和非遗传因素)。因此,如果人们能不吸烟、选择适宜的膳食、从事适度的体力活动,以及 1 Is Cancer Preventable? The vast majority of human cancers are caused by environmental factors, the most important of which are smoking, diet and related factors such as weight and physical activity, and carcinogenic factors in the workplace and elsewhere. Whether people get cancer depends on the intensity of exposure to these environmental factors and the individual’s sensitivity (both genetic and non-genetic). So if people can not smoke, choose the right diet, do moderate physical activity, and