女,25岁。车祸伤后胸闷不适。体格检查:左肺呼吸音明显减弱。胸片:左肺压缩70%,两侧肋膈角清晰。行胸腔闭式引流时,插管应位于()
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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