慢性肺心病形成肺动脉高压的主要因素是() ["毛细血管床减少","支气管感染","缺氧肺小动脉收缩痉挛","肺静脉压增高","肺小血管炎"]
男,28岁,先天性上睑下垂,上睑提肌肌力活动小于4mm,选择下列何种手术方式() ["上睑提肌松解术","睑板-结膜部分切除","滑行睑板-结膜瓣","上睑提肌缩短","额肌悬吊"]
内治法适用于治疗除下列哪一项以外的疾病:() ["A.内痔嵌顿伴有继发感染者","B.Ⅰ、Ⅱ期内痔","C.结缔组织外痔","D.肛隐窝炎","E.直肠脱垂"]
根尖周囊肿的X线表现为() ["根尖周骨质有破坏,牙槽突有吸收","根尖周骨质不规则破坏,边界清楚,边缘不光滑,但范围局限","根尖周骨质有破坏,但边界清楚,病变范围小,周围无致密骨白线","根尖周骨质有破坏,周围有致密骨白线","根尖周骨质未见明显破坏"]
男性,46岁,咽痛2周,突发腰痛.发热2天,查尿常规:蛋白(+),红细胞15~20/HP,形态正常,白细胞20~30/HP,最可能的诊断是(). ["急性肾小球肾炎","IgA肾病","急性肾盂肾炎","输尿管结石","急性前列腺炎"]
阐述上矢状窦血栓形成的临床特点。