If the patient vomits during mouth-to mouth resuscitation，the rescuer should FIRST（）.

A.ignore it and continue mouth-to-mouth ventilation

B.pause for a moment until the patient appears quiet again，then resume ventilation mouth-to-mouth

C.switch to mouth-to-nose ventilation

D.turn the patient's body to the side，sweep out the mouth and resume mouth-to-mouth ventilation

旅游消费心理的源泉是（）

A.主观意识

B.客观现实

C.旅游消费行为

D.旅游需要