单项选择题
骨折患者卧床休养、患肢制动时骨钙丢失量约为()
A.50-100mg/d
B.100-150mg/d
C.150-200mg/d
D.200-250mg/d
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单项选择题
A.50-100mg/d
B.100-150mg/d
C.150-200mg/d
D.200-250mg/d
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