男52岁，1周来出现阵发性夜间心前区闷胀，伴出汗，每次持续约10分钟，能自行缓解，白天可正常工作。1小时前在熟睡中再发心前区胀痛，明显压抑感，自服速效救心丸无效，症状持续不缓解而来院。既往体健，无类似发作。入院查心电图呈心前区导联ST段抬高。该患者最可能的诊断是（）。
A.劳力性心绞痛
B.初发性心绞痛
C.恶化型心绞痛
D.变异型心绞痛
E.梗死后心绞痛
参考答案：D
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| Today it is quite natural to find people shake hands in some situations. People all over the world shake hands for many different 1 . We shake hands when we meet new people 2 during special festivals. Players often shake hands before or after 3 . Business people shake hands when they make a deal. Why do people shake hands 4 shaking feet? This is because of the fact that a long time ago most people 5 knives or guns. If some of them decided that they did not want to 6 , they would show their empty hands. 7 people shook hands so that they could not 8 knives in their sleeves (袖子). Later on, handshaking became a symbol of 9 . Now we don't have to 10 people with guns or knives. However, we still shake hands all the time! The reason is simple — it is still a way to show friendship. | ||||
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