Results: the procedure has clear vision, with less bleeding. And the curative effect was satisfactory.
结果：手术过程视野清晰，出血少，疗效满意，均未出现严重并发症。
The side effect (contain bleeding)was no significant difference (P>0.05) between two groups.
两组副作用（包括出血）无显著差异（P>0.05）。
The side effect (contain bleeding)was no significant difference (P>0.05) between two groups.
两组副作用（包括出血）无显著差异（P>0.05）。
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