为确诊血卟啉症,最必要的实验室检查是

A、血清K_TagUpStart_+_TagUpEnd_.Na_TagUpStart_+_TagUpEnd_.Cl_TagUpStart_-_TagUpEnd_.Ca_TagUpStart_2_TagUpEnd__TagUpStart_+_TagUpEnd_.Mg_TagUpStart_2_TagUpEnd__TagUpStart_+_TagUpEnd_
B、血常规
C、血糖
D、血沉
E、血δ-ALA和PBG