Methods Field experimental observation on purification efficacy of electronic air cleaner on particle and natural bacteria in the air was made.

方法采用现场实验观察电子空气净化机对可吸入颗粒、空气中自然菌的净化效果。

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Patients in observation group were treated with Lev-ofloxacin based on the control group, then the efficacy of the two groups were compared.

观察组在对照组治疗基础上加用左氧氟沙星治疗，比较两组治疗效果。

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