女，13岁，右膝部痛，结合图像，最可能的诊断是（）

A.胫骨近端动脉瘤样骨囊肿

B.胫骨近端成软骨细胞瘤

C.胫骨近端骨巨细胞瘤

D.胫骨近端内生软骨瘤

E.以上都不是

A tourniquet should be used to control bleeding ONLY（）.

A.with puncture wounds

B.when all other means have failed

C.when the victim is unconscious

D.to prevent bleeding from minor wounds