李某，女，45岁。患风湿病13年，近2个月以来，每次干家务活后就出现呼吸困难、胸痛，自行服用硝酸甘油可缓解。病人近期夜间睡眠欠佳，常因胸闷而憋醒，坐起后可缓解，并曾先后晕倒2次。身体评估：胸骨右缘第二肋间可触及收缩期震颤和闻及喷射状的收缩期杂音。心电图示：左心室肥厚伴继发性ST-T改变。多普勒超声测出主动脉瓣口面积0.8cm2。
此病人最可能的疾病诊断是（）
A.主动脉瓣狭窄
B.二尖瓣狭窄
C.心绞痛
D.房颤
E.心肌病
参考答案：A
| Lucky to have him When I met him, I had a lot of anger inside of me. I never had a father, though in my neighborhood that's not__1__. I know some kids just like me. You have to __2__ yourself. There are fights and killings all the time. I have friends who ended up in jail or pregnant. I could have ended up that way, too, __3__ Mr. Clark and my mom wouldn't let that happen. Mr. Clark worked long hours, making sure I did my work. My grades rose. In fact, I did so well that in sixth grade, I entered the __4__ class, and Mr. Clark was the teacher. I felt so __5__ to have him for a second year! He took our class to see The Phantom of the Opera. Before the show, he __6__ us to dinner at a restaurant and taught us not to talk with our mouths full. We didn't want to let him __7__,so we listened to him attentively. __8__ of us were surprised when Mr. Clark was selected as Disney's 2000 Teacher of the Year. When he learned he'd won, he said he would __9__ three names out of a hat; he would go to Los Angeles to get the __10__ with those students. But __11__ it came time to draw names, Mr. Clark said, "You're all going." He got __12__ to fly all 37 of us out to Disneyland in California and put us up at the Hilton. People were __13__,but Mr. Clark really cared about us. There's no way I can __14__ most teachers doing that. No way. But he saw something in us that nobody else saw. On graduation day, there were a lot of tears. We didn't want his class to __15__. In the new school year, we were all happy when Mr. Clark __16__ in our class once again. He's been a __17__ in our lives. In 2003, Mr. Clark took some of us on a trip to South Africa to __18__ school supplies and visit orphanages. It was the most amazing __19__ of my life. It's now my __20__ to one day start a group of women's clubs, helping people from all backgrounds.
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