Few people paid full attention to their health conditions ________ they were seriously ill.

A．when

B．if

C．until

D．after

关于败血症的病原学检查，下列哪项是错误的（）。

A.尽量在应用抗菌药物前及寒战、高热时进行血培养

B.宜反复多次送检

C.采血量不宜多，成人2-3ml，婴儿1-2ml

D.已用抗菌药物的病例可加对氨苯甲酸等以破坏抗生素

E.有条件时同时进行真菌和厌氧菌的培养