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当前学科：口腔正畸综合练习
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一青年男性，外伤后就诊，主诉为进行性呼吸困难，查体患侧胸廓饱满、肋间隙变宽，叩诊呈鼓音，最可能的诊断是（）.
A . 胸腔积液
B . 肺不张
C . 肋骨骨折
D . 肺气肿
E . 气胸
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