下述关于鼻出血的说法哪些项是正确的()。 ["老年性鼻出血多与高血压有关","反复鼻出血,出血点不明确,可行选择性血管造影","局部止血的同时应注意全身治疗","近期涕中带血应考虑恶性肿物","血液病鼻出血纱条填塞可长期留置"]
以下各项中,不影响气雾剂粒大小的因素是() ["容器种类","抛射剂类型","抛射剂压力","阀门类型","药物与附加剂"]
荧光显微镜的使用条件是() ["日光","常见光","灯光","暗室、紫外光","激光"]
在研究职业性疾病时,因健康工人效应造成的偏倚称为() ["测量偏倚","检出症候偏倚","易感性偏倚","奈曼偏倚","信息偏倚"]
诊断绞窄性肠梗阻最可靠的依据是() ["阵发性腹部绞痛","有气过水音和金属音","X线检查小肠有多个阶梯状液","频繁呕吐,呕吐物为胃肠液","腹肌紧张,有压痛和反跳痛"]
换药操作方法