患者，男性，62岁。1年来时有心悸、黑矇发作，行动态心电图（Hol_爱下问搜题

搜题请搜索小程序“爱下问搜题”

问题单项选择题 A2型题

患者，男性，62岁。1年来时有心悸、黑矇发作，行动态心电图（Holter）示24小时总心率50000余次，短阵房性心动过速，最长RR间期为3.2秒，其首要诊断为（）

A.窦房传出阻滞

B.慢-快综合征

C.房室传导阻滞

D.短阵房性心动过速

E.窦性静止

答案

参考答案：B

解析：窦房结及其邻近组织的病变引起窦房结起搏功能和（或）窦房结传导障碍，从而产生多种心律失常和临床症状。病因有冠心病、风湿性心脏病、高血压心脏病等，可能以窦房结及其邻近组织的特发性纤维化变性最常见。以心率缓慢所致的脑、心、肾等脏器供血不足，尤其是脑供血不足症状为主，如心悸、乏力、头晕、近乎晕厥，甚至晕厥等症状。合并快速心律失常时称为慢一快综合征。患者有缓慢性心律失常基础，24小时总心率仅为5万余次，最长RR间期为3.2秒，同时伴有快速性心律失常，故考虑为病态窦房结综合征中慢-快型。

完形填空

Long long ago, there was a small village．This village had a 31  tradition．At the beginning of every year, any boy who had reached the age of majority (成年) was given land and money to build a home．The boy had to 32 his home before winter．If his home failed to endure the cold weather in winter, the villagers could not 33  him in any way．
One 34  , Paul and Marc reached their majority．They 35 their land and money and decided to search nearby villages for ideas on building their homes．In each village, they found the nicest   36  and talked to the owners．Each owner gladly offered 37 ．
After Marc saw several homes, he 38 the best ideas and went back to his own land．Paul, however, continued collecting more ideas．Soon he had so many great ideas that he began to 39 some of them．But he always believed he could find even better ideas in the next village．
Marc began building his home．He had several false starts, 40  his home gradually rose from his land．By fall, Marc had finished his home．It wasn't perfect，but it was strong and he could 41 it later. Paul enjoyed all the beautiful homes and 42  with home owners．The first snow came and Paul, realizing he was running out of time, 43   back to his land．He built the best home he could in the time he had, but it was weak．The first winter storm destroyed his home and he froze to 44 ．The villagers mourned for him．
Marc survived the winter．Each year, Marc searched for other good ideas he could use to make his own home look better．He became a leader in the village, 45  a family, and lived a happy, content life．

A．conversations

B．achievements

单项选择题案例分析题

某设有电梯的高层厂房，建筑高度34m，请回答以下问题：

消防电梯井、机房与相邻电梯井、机房之间，应采用耐火极限不低于（）h的墙隔开。

A.4

B.3

C.2.5

D.2