Results: the observation group was better than control efficacy was statistically significant difference.
结果：观察组疗效明显优于对照组，差异有统计学意义。
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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