男性，30岁，司机，既往体健，2个月前无明显诱因出现腰背部疼痛，休息时症状减轻，劳累时加重。3天前腰部扭伤后疼痛加剧并向左下肢放射。查体：腰部外观正常，弯腰活动受限，第4、5腰椎棘突上和棘突间有压痛。此患者最可能的诊断是（）

A.腰椎结核

B.腰椎间盘突出症

C.腰椎管狭窄症

D.腰部肌筋膜炎

E.急性腰扭伤

— What can we learn from Lei Feng?

— We should not only think about          , we should think about others as well.

A．yourself

B．ourselves

C．themselves

D．yourselves