我们发现在某工厂SO_2浓度很高的车间里的工人,慢性气管炎的发生率高达90％以上,这对工人的健康和生产有着极大的影响。我校气管炎临床研究组曾用马加木浸膏治疗慢性气管炎,其效果较为满意,我们经动物实验,证实了这一疗效是病变组织的恢复而来的。在这些基础上为探讨马加木能否预防慢性气管炎,特别是对SO_2浓度很高的环境下劳动的人员能否预防的问题, We have found that the incidence of chronic bronchitis among workers in workshops with high concentrations of SO 2 is as high as 90%, which has a great impact on the health and production of workers. The bronchitis clinical research team of our school had used Makassar extract to treat chronic bronchitis. The effect was relatively satisfactory. We confirmed that this effect was due to the recovery of diseased tissue through animal experiments. Based on these foundations, to explore whether Magama can prevent chronic bronchitis, especially if the personnel working in an environment with high SO 2 concentration can prevent it,