抗组胺类药物的作用机制是() ["A.降低机体对组胺的反应","B.阻止和减少组胺的释放","C.促进组胺在体内分解、排泄","D.与组胺竞争结合受体"]
细菌性角膜炎常见的病因是() ["A.内源性感染","B.巩膜炎症所致","C.角膜外伤后感染","D.剔除角膜异物后感染","E.虹膜炎症所致"]
门脉高压时门静脉的血液可通过哪几条侧支循环途径经上、下腔静脉回流入心脏?
皮肤科使用抗组胺药主要针对() ["A.H受体","B.H受体","C.H受体","D.胆碱受体"]
试述下肢浅静脉的行径和注入部位。
门静脉的组成及特点?