Methods: 61 patients with massive emptysis were divided into two group in random.
方法：将61例大咯血患者随机分为两组。
Methods 122 patients with massive emptysis were divided into two group in random.
方法：将122例大咯血患者随机分为两组。
Methods 122 patients with massive emptysis were divided into two group in random.
方法：将122例大咯血患者随机分为两组。
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