击出性骨折
击出性骨折:也称眶底爆折,是当眼部受钝器伤后,眶内压力骤增,致使眶底薄弱处骨折;骨折片、眶内软组织、眼肌等随之"疝"入上颌窦。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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