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
考研
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
2019-09-30
117
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 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 tube or a catheter—it could expand and cause injury.
Another common in-flight problem is deep venous thrombosis—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 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.
We can learn from Paragraph 3 that deep venous thrombosis usually happens because _____.
选项
A、the economy class is not spacious enough
B、there are too many economy-class passengers
C、passengers are not allowed to walk during the flight
D、the low pressure in the cabin prevents blood flowing smoothly
答案
A
解析
因果细节题。第三段最后一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二句中的cramped表明经济舱的空间狭窄,因此A项为本题答案。
转载请注明原文地址:https://kaotiyun.com/show/RYe4777K
0
考研英语二
相关试题推荐
Bysayingthatacountry’sagriculturalsurplusesoften"complicate"itseconomy,theauthormeans______.Itcanbeinferredt
Accordingtothepassage,thefactthatyoungpeopleseemtobelosinginterestinscience______.Thesecondparagraphismain
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
TheUnitedStateshashistoricallyhadhigherratesofmarriagethanthoseofotherindustrializedcountries.Thecurrentannual
In1999,thepriceofoilhoveredaround$16abarrel.By2008,ithad【1】the$100abarrelmark.Thereasonsforthesurge【2】fro
Whilethere’sneveragoodagetogetcancer,peopleintheir20sand30scanfeelparticularlyisolated.Theaverageageofac
Thesetwochemicals______witheachotheratacertaintemperaturetoproduceasubstancewhichcouldcauseanexplosion.
Applicantsshouldnotethatallpositionsare______toAustraliancitizenshiprequirements.
Asanyonewhohastriedtoloseweightknows,realisticgoal-settinggenerallyproducesthebestresults.That’spartiallybecau
随机试题
患者男,18岁,反复鼻腔、口腔出血2年,每次出血量约150~250ml。检查:轻度贫血貌。血压114/63mmHg,HR87次/分,HB7.8。鼻腔检查:左鼻腔后段可见淡红色新生物,表面有血迹,触之易出血。电子鼻咽镜检查:鼻咽部有约3cm×2.5cm×
“十恶”中危害国家安全的是______。
有关同一控制下企业合并的处理方法中,下列表述正确的有()。
默读短文,完成题目。成语里的歌声①翻阅成语大词典,你能找到许多形容歌唱的词汇,你会听到许多成语里飞扬的歌声。这歌声唤出了历史,展现着我们祖国民族音乐五千年的文明底蕴和独特的迷人风采
司法机关行使宪法解释权源自的国家是
棚户区
SoBig.Fdamagedcomputerprogramsmainlyby______.Thetoneofthetextcanbestdescribedas______.
阅读以下说明和C++程序,将应填入(n)处的字句写在对应栏内。[说明]本程序使用类来管理员工的通讯地址信息。已知程序的输出为:输出记录:5姓名:王丽华街道地址:中华路15号市:襄樊市省;湖北省邮政编
TheGreenCampusIfyouattendedthisyear’scommencement(毕业典礼)atWilliamsCollegeinwesternMassachusetts,youprobably
PsychologistGeorgeSpilichandcolleaguesatWashingtonCollegeinChestertown,Maryland,decidedtofindoutwhether,asmany
最新回复
(
0
)