[名词解释] 先攻后补

对诊断上颌窦癌，最有价值的征象为() ["A．窦腔密度高伴骨质破坏","B．窦腔密度高伴骨质增生","C．窦腔密度高伴骨壁膨胀","D．窦腔密度高伴气液面","E．窦腔密度高伴同侧鼻腔高密度"] 何谓绿色食品? 何谓优质蛋白质? 虚者补之 新生儿败血症早期最主要特点是() ["A．高热","B．血白细胞总数增高","C．皮肤有伤口","D．硬肿","E．缺乏特异性症状"] 先攻后补