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【单选题】
关于腰椎间盘突出症的描述正确的是A.
托马斯征阳性
B.
拾物试验阳性
C.
直腿抬高试验和加强试验阳性
D.
患部活动受限，好发于50岁左右
E.
早期局部分层穿刺有助于诊断
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A.
a heavy traffic
B.
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C.
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D.
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