---___________ is it from here to Yancheng Railway Station?

---About two kilometers.

A．How often

B．How far

C．How soon

D．How long

小儿秋季腹泻常见的病原体是 （）

A.大肠杆菌

B.空肠弯曲菌

C.柯萨奇病毒

D.轮状病毒

E.埃可病毒