临床上最常见的慢性呼吸衰竭病因是
A.严重胸廓畸形B.慢性阻塞性肺疾病C.呼吸肌病变D.神经系统病变E.重症肺结核
参考答案:B
Your brother _____ be hungry now—he had lunch only two hours ago! [ ]
A. wouldn't
B. can't
C. mustn't
D. needn't
男性,6岁。出生后即发现口唇发绀,活动能力差,喜蹲踞。查体:发育不良,口唇青紫明显。心前区搏动增强,胸骨左缘Ⅲ级收缩期杂音,伴有轻度震颤,肺动脉瓣区第二心音减弱。杵状指。X线胸片见心影略大,心尖钝圆、上翘,心腰凹陷,主动脉增宽,肺野清晰。心电图检查:右室肥厚。心血管造影诊断法洛四联症。
体格检查中肺动脉瓣杂音的强弱说明()
A.肺动脉瓣区收缩期杂音越响,病变越重
B.轻收缩期杂音,说明肺动脉瓣狭窄不重
C.肺动脉高压引起肺动脉瓣区杂音降低
D.肺动脉瓣严重狭窄时,收缩期杂音可降低
E.室缺越大,肺动脉瓣区收缩期杂音越响