诊断右心衰竭最可靠的体征为（） ["肝大","下肢水肿","腹水","肝颈静脉回流征阳性","胸腔积液"]
下列哪项是引起继发性再生障碍性贫血较常见的病因（） ["药物及化学物质","物理因素","病毒感染","细菌感染","营养因素"]
心力衰竭并发心房扑动时首选（） ["普萘洛尔","普罗帕酮","奎尼丁","快速洋地黄制剂","胺碘酮"]
急性左心衰竭，高度呼吸困难、烦躁不安时立即给予（） ["地西泮肌内注射","吗啡皮下注射","氨茶碱静脉注射","吸氧","坐位，两腿下垂"]
老年人伴有心力衰竭的治疗为（） ["洋地黄类药无效","不宜选用洋地黄类药","须用较大剂量的洋地黄类药","洋地黄类药的剂量应减少","洋地黄类药可使病情恶化"]
如何正确执行校准规范？
