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男，25岁。创伤后右髋部疼痛，不能活动，右大腿后侧及右小腿后外侧有麻木感。查体右下肢短缩、屈曲、内收、内旋畸形，手法复位后畸形矫正，髋关节活动恢复正常，但上述区域麻木感仍存在，膝以下感觉迟钝，小腿和足部肌力Ⅲ级。X线片示右髋臼后上缘有1cm×2cm骨块，无移位。最可能的诊断是( )。A、髋关节前脱位并髋臼骨折 B、髋关节后脱位并髋臼骨折 C、髋关节前脱位、髋臼骨折、坐骨神经损伤 D、髋关节后脱位、髋臼骨折、坐骨神经损伤 E、髋关节中心性脱位并坐骨神经损伤 最恰当的处理是( )。A、闭合复位+骨牵引2个月 B、闭合复位+皮牵引3个月 C、闭合复位+髋人字石膏固定3个月 D、闭合复位+严格卧床休息1个月，进行功能练习 E、开放复位，内固定及坐骨神经探查 经上述处理后，神经损伤无修复，下列哪项处理？( )A、继续观察3个月，无好转再予处理 B、手术探察神经 C、手术切除骨折块 D、理疗、按摩及针灸治疗 E、药物治疗及功能练习
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