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吸烟是支气管肺癌发生的重要原因,在世界各国的调查中都有明确的报告(1)。近年来虽在个别报告之间观点上有分岐(2、3),但就大部分的研究调查资料来看,吸烟与肺癌发生的关系基本已
Smoking is an important cause of bronchial lung cancer. There are clear reports (1) in investigations in various countries around the world. Although in recent years there has been a division of opinion between individual reports (2, 3), the relationship between smoking and the occurrence of lung cancer has been basically observed in most research data.