首页
登录
职称英语
A study published in the New England Journal of Medicine estimated that ther
A study published in the New England Journal of Medicine estimated that ther
游客
2023-08-14
19
管理
问题
A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies on U.S. flights every day. Most of them are not grave; fainting, dizziness and hyperventilation (换气过度) are the most frequent complaints. But 13% of them—roughly four a day—are serious enough to require a pilot to change course. The most common of the serious emergencies include heart trouble (46%), strokes and other neurological problems (18%), and difficult breathing (6%).
Let’s face it: plane riders are stressful. For starters, cabin pressures at high altitudes are set at roughly what they would be if you lived at 5,000 to 8,000 feet above sea level. Most people can tolerate these pressures pretty easily, but passengers with heart disease may experience chest pains as a result of the reduced amount of oxygen flowing through their blood. Low pressure can also cause the air in body cavities to expand—as much as 30%. Again, most people won’t notice anything beyond mild stomach cramping. But if you’ve recently had an operation, your wound could open. And if a medical device has been implanted in your body—a splint, a tracheotomy (气管切开术) tube or a catheter (导管) —it could expand and cause injury.
Another common in-flight problem is deep venous thrombosis (深静脉血栓)—the so-called economy-class syndrome. When you sit too long in a cramped position, the blood in our legs tends to clot. Most people just get sore calves. But blood clots, left untreated, could travel to the lungs, causing breathing difficulties and even death. Such clots are readily prevented by keeping blood flowing; walk and stretch your legs when possible.
Whatever you do, don’t panic. Things are looking up on the in-flight-emergency front. Doctors who come to passengers’ aid used to worry about getting sued; their fears have lifted somewhat since the 1998 Aviation Medical Assistance Act gave them "good Samaritan" protection. And thanks to more recent legislation, flights with at least one attendant are starting to install emergency medical kits with automated defibrillators (电击去颤器) to treat heart attacks.
Are you still wondering if you are healthy enough to fly? If you can walk 150 ft. or climb a flight of stairs without getting winded, you’ll probably do just fine.
Having a doctor close by doesn’t hurt, either. [br] According to the passage, the expansion of air in body cavities can result in ______.
选项
A、heart attack
B、chest pain
C、stomach cramping
D、difficult breathing
答案
C
解析
第2段第4句提到了“体腔内空气膨胀”,接下来三句分别列出了这种现象可能导致的三种病症,其中选项C在第5句提到。为本题答案。
转载请注明原文地址:https://tihaiku.com/zcyy/2923946.html
相关试题推荐
[originaltext]W:Steven,ifIgotoEngland,whichonewouldyousayisthebes
[originaltext]W:Jason,actuallyI’mgoingtoEnglandthissummer.M:Really?T
[originaltext]W:We’veallheardthesaying“Laughteristhebestmedicine.”Ho
[originaltext]W:We’veallheardthesaying“Laughteristhebestmedicine.”Ho
[originaltext]W:We’veallheardthesaying“Laughteristhebestmedicine.”Ho
ThreeEnglishdictionariespublishedrecentlyalllayclaimtopossessinga
ThreeEnglishdictionariespublishedrecentlyalllayclaimtopossessinga
ThreeEnglishdictionariespublishedrecentlyalllayclaimtopossessinga
AstudypublishedintheNewEnglandJournalofMedicineestimatedthatther
AstudypublishedintheNewEnglandJournalofMedicineestimatedthatther
随机试题
Limestonethatcanbehighlypolishedis_______marble.A、substitutedbyB、known
海港工程所采用的高性能混凝土,其抗氯离子渗透性不应大于()。A.150C B
在境外旅游期间,若发生旅游者伤亡或病故的情况,领队应及时做好的工作有()A.报告
某企业2016年底投资15000元购入一台设备,该设备预计残值为0元,可使用三年
下列哪种原因可引起尿道球部损伤A.骨盆骨折 B.会阴部骑跨伤 C.下腹部撞击
不属于培训课程需求度调查的要求的是( )。A.课程体系建设需要和员工个人学习发
有“交通心肾”功用的方剂是A.地黄饮子 B.天王补心丹 C.桑螵蛸散 D.
发展依然是当代中国的第一要务,中国执政者的首要使命就是集中力量(),逐步实现共
材料:生物识别 材料1: 生物识别技术是指通过计算机与光学、声学、生物传感器
某公司取得出让土地使用权后,超过出让合同约定的动工开发日期满两年仍未动工,市政府
最新回复
(
0
)