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[单选题] 脊休克发生的原因是（ ）
A
横断脊髓的损伤性刺激
B
外伤所致的代谢紊乱
C
横断脊髓时大量出血
D
断面以下脊髓丧失高位中枢的易化调节
E
失去了脑干网状结构易化区的始动作用
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试题答案：
D
答案解释：
脊休克发生的原因是脊髓突然失去高位中枢的易化调节，而不是因切断损伤的刺激引起的
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