问题 单项选择题 A1型题

有关动脉瘤手术,以下哪项概念是错误的()

A.某些情况下可以切断一侧大脑前动脉A1段,以利于对基底动脉瘤进行夹闭

B.对前交通动脉瘤可以行动脉瘤孤立术

C.某些情况下一侧后交通动脉可以永久性阻断

D.某些情况下一侧大脑后动脉Pl段可以永久性阻断

E.对合并较大血肿的动脉瘤,可先清除血肿,再处理动脉瘤

答案

参考答案:B

解析:前交通动脉本身有分支供应穹隆、胼胝体、透明隔和扣带回前部,阻断后可引起严重的近记忆丧失,故不可在前交通动脉瘤两侧阻断前交通动脉行动脉瘤孤立术。对基底动脉瘤进行手术的过程中,根据动脉发育以及颅底动脉环的交通、代偿情况,在保证脑组织正常供血的前提下,永久性阻断一侧大脑前动脉Al段、一侧后交通动脉或一侧大脑后动脉Pl段,可以增加术野的显露,但要严格掌握适应证。对合并较大血肿的动脉瘤,清除血肿可降低颅内压,增加术野显露,有助于动脉瘤的处理。

阅读理解

Children of America are getting fatter every time. 13% of the children at the age of 6 to 11 are overweight(too fat).

When we look at children's lives today in the USA, we can see the root(origin)of the problem--sports and foods. Young children like sports but they don't have enough around the start of high school. That's especially true for girls. Meanwhile, to make matters worse, schools are becoming much more interested in sports teams. So children are not able to get enough exercise just when they need it the most. There is also the food problem. Children get most of their calories(热量) at restaurants or parties or somewhere else away from home. They often drink too many Cokes. Parents have a lot of fears about telling a child he needs to lose weight-- they are afraid it will push a child into an eating disorder. Some parents fear that pushing children to lose weight means their children will think they're not good enough, or not loved because of their weight. Parents need to come to terms with the fact that the family is very important to the children. The most useful program for children is called "family weight control". This is good news. Mom and Dad, even if they don't have weight problems, have to go through the same program as their children and learn how to get some exercise and how to eat healthily.                                                                      

小题1:Why are American children getting fatter? The writer thinks_______.

A.parents also have weight problem as their children

B.children drink too many Cokes

C.schools are more interested in sports teams

D.children have less exercise and eat unhealthily小题2:The writer wants to tell parents that_______.

A.overweight children are not loved by people

B.children are afraid to lose weight when they have to

C.family members can help overweight children a lot

D.girls don't like to exercise小题3:Which of the following is NOT the root of overweight problem? _______.

A.Higher-calorie.

B.Less sports.

C.Family weight control.

D.higher-fat foods.小题4:The writer thinks if mother or father is on the same program as their children, _______.

A."family weight control" will be successful

B.it will make the children eat much more

C.their children will not eat better

D.parents will feel sorry about themselves

单项选择题