随着经济的发展,职业病危害因素分布广泛且危害的人群数量日趋庞大,导致职业病发病数量居高不下。我国每年新增尘肺病例约1万例,每年报告的职业中毒和生产性农药中毒近3万例,报告中毒死亡数约1500例,每年因职业病和工伤事故造成的经济损失高达2500亿元人民币[1-2]。由于存在不? With the development of economy, the number of people with widely distributed and harmful occupational hazards has become increasingly large, resulting in a high number of occupational diseases. There are about 10,000 cases of pneumoconiosis newly reported every year in our country. Nearly 30,000 cases of occupational poisonings and productive pesticide poisonings are reported each year. The number of reported poisoning cases is about 1,500 cases each year. The annual economic losses due to occupational diseases and industrial accidents are as much as 250 billion yuan [ 1-2]. Because of the existence of not?