护士给1.5岁小孩喂口服药时，患儿吵闹不停，护士应采取的正确措施为（）

A.将口服药物放入糖水中喂入

B.以注射打针威胁患儿，使其咽下

C.捏住双侧鼻孔，以利吞咽

D.将口服药放入患儿的粥内，同时喂哺

E.可用小匙留在口中压住舌尖，直至患儿将药物吞咽

-Can you show me _______ to use this kind of camera?

-Sorry, I don't know, _______.

A．how; either

B．what; too

C．how; too

D．what; either