A.手術(shù)時(shí)間過(guò)長(zhǎng) B.黏膜骨瓣松弛不夠,縫合時(shí)張力過(guò)大 C.手術(shù)未給大劑量抗生素 D.病兒年齡過(guò)小 E.術(shù)后拆線(xiàn)時(shí)間過(guò)晚