You_____ all those calculations! We have a computer to do that sort of thing.

A．needn’t have done

B．must not have done

C．shouldn’t have done

D．can not have done

男装卸工，40岁，腰扭伤，经治疗腰痛缓解，但仍有左下肢麻痛并放射，查体：腰背肌痉挛，沿坐骨神经走行有压痛，直腿抬高试验阳性，最可能的诊断是（）

A.腰部棘上韧带炎

B.腰椎结核

C.腰椎骨髓炎

D.单纯坐骨神经痛

E.腰间盘突出症