—Oh, my God, I'm on my last legs!

—__________. Worry won't help.[ ]

A. Take it easy                      

B. It doesn't matter

C. All the best                      

D. Try your luck

诊断甲型肝炎最实用的病原学检测方法是 （）

A.免疫电镜法检测粪便标本中病毒颗粒

B.取粪便标本作病毒分离培养

C.PCR检测血液中HAVRNA

D.粪便标本中特异性抗原的检测

E.ELISA检测血中抗-HAVIgM