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预防术后肺不张最主要的措施是A．应用大量抗生素B．蒸汽吸入C．多翻身多做深呼吸，鼓励咳嗽D．应用祛

预防术后肺不张最主要的措施是

A．应用大量抗生素

B．蒸汽吸入

C．多翻身多做深呼吸，鼓励咳嗽

D．应用祛痰药物

E．氧气吸入

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