下列可出现心脏扩大呈靴形心的疾病是() ["主动脉瓣狭窄","主动脉瓣关闭不全","肺心病","二尖瓣狭窄","扩张型心肌病"]
试述手术区皮肤消毒的原则。
男,4个月。生长发育良好,体重为6kg,因母亲患慢性疾病,需停用母乳而改牛奶喂养。每日所需水分是() ["A.900ml","750ml","650ml","550ml","450ml"]
下列关于心包摩擦感的描述,不正确的是() ["舒张期明显","可见于化脓性心包炎","深呼气后屏住呼吸更易触及","胸骨左缘第4肋间最易触及","坐位前倾更易触及"]
试述外科患者疼痛的护理。
试述皮肤准备的注意事项。