男，12岁，2月3日发病，突起高热、头痛、呕吐2天，入院体检见全身皮肤有淤点、淤斑，昏睡，颈有抵抗，血白细胞19．2×10⁹/L，N93％，L7％

最有价值的检查为（）

A.钩端螺旋体凝集试验

B.大便常规检查

C.腰穿作脑脊液常规及一般细菌培养

D.尿常规

E.血培养一般菌

Carelessness always contributes _______ car accidents. Therefore, drivers are advised to concentrate their attention _______ driving.

A．for; to

B．to; on

C．with; on

D．in; to