女，30岁，发热1周，左腹股沟区可扪及5cm×4cm×3cm大小肿物，有压痛，有波动感。首选的抗菌药物是（）

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治疗应该采用()
A. 抗甲状腺药物
B. I治疗
C. 碘剂治疗
D. 普萘洛尔
E. 甲状腺次全切除

A.60
B.50
C.40
D.30