问题：
[单选题]患者，女性，70岁，不慎摔倒致右股骨转子骨折，伴移位。因心功能不全不宜手术治疗，采用骨牵引。应重点预防的并发症是（ ）。
A、骨筋膜室综合征
B、脂肪栓塞
C、坠积性肺炎
D、肌肉挛缩
E、创伤性关节炎
参考答案：
C
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