问题：
[单选题]患者男性，61岁。因股骨干骨折行持续性骨牵引，其护理措施中错误的是（ ）。
A、抬高床尾15～30cm
B、每天用酒精滴牵引针孔
C、患者不适时可去掉部分重量
D、定时测量肢体长度
E、指导患者功能锻炼
参考答案：
C
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