The parameters of pulmonary function were improved step by step and the differences were statistically significant at the latest stage of treatment (P<0.05).
各治疗阶段肺功能指标逐步改善，至治疗后期，肺功能指标在统计学上有显著性差异（P<0.05）。
The level of serum glucocorticosteroid was higher in dead group and decreased step by step in survival group( P< 0 01).
循环血皮质醇浓度显示死亡组患者一直处于较高水平 ，而存活组呈进行性下降 （P< 0 0 1）。
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