The president of the World Bank says he has a passion for China, ______ he remembers starting as early as his childhood.

A．where

B．which

C．what

D．when

既能收敛止血，又兼散瘀的药物是（）。

A.藕节

B.血余炭

C.蒲黄

D.茜草

E.棕榈炭