首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies
A study published in the New England Journal of Medicine estimated that there are an average of 30 in-flight medical emergencies
admin
2018-05-11
22
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.
According to the passage, why does deep venous thrombosis usually happen?
选项
A、Because the economy class is not spacious enough.
B、Because there are too many economy-class passengers.
C、Because passengers are not allowed to walk during the flight.
D、Because the low pressure in the cabin prevents blood flowing smoothly.
答案
A
解析
第3段末句建议乘客有机会就多运动或伸展腿部,由此可以推断该段第2句中的cramped表明经济舱的空间狭窄,因此选项A为本题答案。
转载请注明原文地址:https://kaotiyun.com/show/1KT7777K
0
大学英语六级
相关试题推荐
Throughouthistorymanhasobservedsuchnaturalcyclesastherisingandsettingofthesun,theebbandflowoftheoceantide
A、Brighterpeoplegotbetterpay.B、Payscaleswerenotfairatall.C、Maleswerebrighterthanfemales.D、Paysdependedonone’
Innovation,theeffectiverecipeofprogress,hasalwayscostpeopletheirjobs.Overthepast30yearsthedigitalrevolutionh
A、Shy.B、Meticulous.C、Outgoing.D、Studious.CDr.Donald提到手写字体较小的人比较害羞、一丝不苟和勤奋一些,而字体比较大的人会更加外向。
WilmaSubrahadnointentionofbecomingapublicspeaker.After【B1】______fromcollegewithdegreesinchemistryandmicrobiolog
A、TheUS.B、Italy.C、China.D、Russia.B
ManyworkerswhoworkedintheWorldTradeCenteraftertheSeptembereleventhattacksbecamesick.Theybreathedamixofdust,
A、Getrich.B、Goodrelationship.C、Health.D、Becomefamous.A演讲开头提到,“有个最新的调查,询问千禧一代最重要的人生目标有哪些。超过80%的人说,他们主要的生活目标是要变富有”。millenni
A、Challenges.B、Disappointments.C、Sorrows.D、Intolerance.D
Inthissection,youaregoingtoreadapassagewithtenstatementsattachedtoit.Eachstatementcontainsinformationgiveni
随机试题
邻菲哕啉比色法测定葡萄酒中的铁时,试液的pH对显色影响较大,必须严格控制pH在7~9再加显色剂。
A.急性早幼粒细胞性白血病B.慢性淋巴细胞性白血病C.急性单核细胞性白血病D.急性淋巴细胞性白血病E.慢性粒细胞性白血病化疗过程中易发生或加重DIC
患者,男,20岁。眩晕,动则加剧,劳累即发,不寐心悸,神疲懒言,倦怠食少,唇甲不华,舌质淡,脉细弱。其治法是
有关颈椎病的鉴别诊断中,下列哪一项不是肩周炎的临床表现()
血小板计数正常值参考范围是()
钻井法凿井施工中,泥浆洗井具有()的作用。
这下轮到我难堪了,我觉得自己像个跳梁小丑,明明输得______,还在那里沾沾自喜。更让我______的是,转败为胜的她并不______。而是乘胜追击,不动声色地提出两个问题来要与我“共同探讨”。填入横线部分最恰当的一项是()。
It’salong_____toGuangzhou.
Thestate’splasticbagbanwas100%successful.
Accordingtothetheoryof______,literaturemustbetruetolifeandexactlyreproducesreallife,includingallitsdetailswi
最新回复
(
0
)