—I think classical music is pleasant.

—_____, I think it's boring. [ ]

A. I agree.

B. I think so.

C. I don't agree.

D. I don't know.

男，25岁，左髋部隐痛近两个月，并向下部放射，休息则症状缓解，发病前一年曾有摔伤史，查体：局部无肿胀，左髋关节旋转稍受限，X线片显示左股骨头膨胀性骨质破坏，破坏区未见骨间嵴，骨皮质变薄，局部穿刺为血性液体，未获得组织块。

合适的治疗是（）.

A.局部刮除+植骨

B.局部刮除+液氮冷冻+松质骨或骨水泥填充

C.广泛切除+大块植骨

D.广泛切除+人工关节置换

E.关节离断术