單項選擇題患兒,女,3歲。消瘦,"X"型腿,肋骨呈串珠狀,"雞胸",方顱。X線提示:骨質(zhì)疏松,掌、腕骨愈合緩慢。治療原則是()

A.補(bǔ)鋅
B.補(bǔ)錳
C.補(bǔ)鈣及維生素D
D.補(bǔ)鐵
E.增加蛋白質(zhì)飲食