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吸烟危害人的健康已是人们的共识,对青少年来说,其危害性就更大。医学专家研究表明,青少年正处在生长发育时期,各生理系统、器官都尚未成熟,其对外界环境的有害因素的抵抗力比成人弱,易于吸收有害物质而损害身体的正常生长发育。对美国25个州的调查结果显示,吸烟开始年龄与肺癌死亡率呈负相关。若将不吸烟者肺癌死亡率定为1.00,则15岁以下开始吸烟者其死亡率为19.68,20～24岁的为10.08,25岁以上的为4.08。吸烟还会损害大脑,使智
Smoking harms people’s health is already a consensus of people. For adolescents, the harm is even greater. Medical experts have shown that youngsters are in a period of growth and development, and all physiological systems and organs are not yet mature. Their resistance to harmful elements of the external environment is weaker than that of adults, and it is easy to absorb harmful substances and damage the body’s normal growth and development. Surveys of 25 U.S. states showed that the age of initiation of smoking was negatively correlated with lung cancer mortality. If the non-smoker’s lung cancer mortality rate is set at 1.00, then the mortality rate for smokers starting under age 15 is 19.68, 10.08 for 20-24 years, and 4.08 for those over 25 years of age. Smoking also damages the brain