问题 多项选择题 案例分析题

患者,男,41岁,主诉胸痛1个小时。双上肢脉搏减弱。行胸腹部CTA检查,曲面重组图像如下图:

关于本病的Stanford分型正确的描述是()

A.StanfordA型累及全部主动脉

B.StanfordA型累及降主动脉

C.StanfordA型累及升主动脉

D.StanfordB型相当于DeBakey分型的Ⅰ型

E.StanfordB型相当于DeBakey分型的Ⅱ型

F.StanfordB型相当于DeBakey分型的Ⅲ型

答案

参考答案:C, F

解析:CT片上主动脉腔内见内膜片形成的线状低密度影以及真、假腔影。据此可诊断为主动脉夹层(DeBakeyⅠ型)。Stanford分型较为简单,A型累及升主动脉,相当于DeBakey分型的Ⅰ型和Ⅱ型,B型不累及升主动脉,相当于DeBakey分型的Ⅲ型。夹层分离突然发生时多数患者表现为典型的刀割样或撕裂样疼痛,向胸前及背部放射,随夹层累及范围而可以延至腹部、下肢及颈部。本病应与动脉瘤附壁血栓形成鉴别,血栓范围较小,管壁钙化位于管腔边缘,而夹层范围较大,且常见内膜内移,钙化位于管腔内。超声是简便易行的检查方法。

阅读理解

If you usually take the school bus or sometimes need to take public buses to school, there are some important rules you should know.

·When you are waiting for the bus, you should wait at the bus stop, and stand well back.

·When you get off the bus, make sure you and the driver can see each other, and wait for the driver to signal you before you cross the road in front of the bus.

·Never go back for anything you may leave on the bus when it is starting.

·Never bend down near the bus when you walk to or from the bus stop.

·You should cross the street at a crosswalk or a street corner, and wait for the light to turn green or for the WALK crossing signal.

·It is important to look carefully to the left, the right and the left again when you cross the street.

·Remember that it is dangerous to stay in the areas around buses where the driver can’t see you. Don’t run between parked cars or buses.

·Do not run across the street or through parking areas to catch up with your friends.

小题1:When you are waiting for the bus, you should wait   .

A.at the bus stop

B.on the street

C.at a crosswalk

D.a street corner小题2:It is important to     when you cross the street.

A.run quickly     

B.wait for the light to turn green

C.look carefully to the left

D.look carefully to the right小题3:If you walk to or from the bus stop, you mustn’t        .

A.bend down on the bus

B.cross the street at a crosswalk or a street corner

C.bend down near the bus

D.look carefully to the left, the right and the left again小题4:This passage is mainly about       .

A.safety rules for students by bus

B.safety rules for drivers

C.safety rules for children by train

D.how to cross the street

问答题 简答题