女性,50岁,右下后牙残冠行局麻下拔除术,在局麻药注射时突然出现头晕,胸闷,面色苍白,全身冷汗,恶心,呼吸困难,诊断为晕厥,应采取的措施是() ["立即停止注射","放平椅位,置患者于头低位","松解衣领,保持呼吸通畅","氧气吸入,静脉注射高渗葡萄糖","以上均是"]
属于特殊结构的固定桥是() ["单端固定桥","双端固定桥","种植固定桥","单端固定桥","复合固定桥"]
具有凉血止血,清肝火功效的药物为() ["大蓟","小蓟","地榆","槐花","白茅根"]
缺铁性贫血治疗首要的是() ["治疗病因","输血","口服铁剂","肌注铁剂","进食富含铁的食物"]
限制血管扩张药在慢性肺心病临床的应用因素有() ["二氧化碳分压上升","氧分压下降","电解质紊乱","反射性产生心律加快","高碳酸血症加重"]
死骨形成的主要原因是什么?X线有何特点?小儿见于哪些病?