【单选题】【消耗次数：1】
在进行耳内镜下鼓膜成形术前，对于哪些情况的患者需要先进行药物治疗？
①
鼓膜穿孔干燥无鼓室病变
②
鼓膜穿孔不稳定
③
患者年龄低于6岁
④
咽鼓管发育成熟
⑤
外耳道直径较大
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