男婴,7个月龄,腹泻3天,近一日排便10余次,为水样便,内有黏液,6小时未排尿。查体:T38℃,体重5.5kg,烦躁不安,哭无泪,皮肤弹性差,前囟凹,四肢末梢暖,此时哪项检查与诊断治疗无关

A、血常规
B、便常规
C、血沉
D、便培养
E、血清K[img=~/QImg/2013-10-14-11-41-40/image004.jpg]、Na[img=~/QImg/2013-10-14-11-41-40/image004.jpg]、Cl[img=~/QImg/2013-10-14-11-41-40/image005.jpg]