单选题:男,4 个月。人工喂养,未添加辅食,两周来轻咳,流涕,伴低热,今晨抽搐 4 次,每次持续约 2min,缓解后玩耍如常。为

题目内容:
男,4 个月。人工喂养,未添加辅食,两周来轻咳,流涕,伴低热,今晨抽搐 4 次,
每次持续约 2min,缓解后玩耍如常。为确诊最有价值的化验检查是 A.心电图
B.腹部 B 型超声
C.胸片
D.血钾、钠、氯、血糖测定
E.血钙、磷、碱性磷酸酶测定

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