In the USA, _______ Thanksgiving Day is a harvest festival. Traditionally, it is _______ time to give thanks for the harvest and express gratitude in general.

A．the; a

B．/; the

C．/; a

D．the; the

痰液有恶臭味，应考虑感染的病原菌是（）

A、上消化道大量出血

B、幽门梗阻

C、溃疡穿孔

D、溃疡癌变

E、肝性脑病