There is no doubt that I'm trying to do what is best, but ________ I have got to consider the cost.

A．merely

B．equally

C．nearly

D．mostly

同时抽取多项血标本时，应将血液最先注入

A．抗凝管
B．干燥管
C．血培养管
D．随意注入一管
E．以上均可