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
2019-06-23
107
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, 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://kaotiyun.com/show/PDX7777K
0
大学英语六级
相关试题推荐
长城被称为中国的奇迹,拥有两千多年的历史。从空中俯瞰,它像一条长龙,从西向东蜿蜒前行,总长约6700公里。从春秋战国时期(theSpringandAutumnPeriodandtheWarringStatesPeriod)起,各诸侯国开始
Fertilizerusehasexploded,overloadingplantsworldwide,likelyalteringecosystemsfordecadestocenturies,scientistsrepor
Depression[A]Inbed,youtossandturn,unabletogetagoodnight’ssleep.Youfeelanxiousandworried.There’splentytod
A、It’sbeingoutdoors.B、Sheneedstodealwithdifferentpeople.C、It’ssometimesdangeroustodriveatnight.D、Shehastowor
A、Therearemoremalegeniusesthanfemalegeniuses.B、PeoplewithbetternutritionaremuchmoreintelligentC、Femaleshavewea
A、Hefellinatrapmadebyahunter.B、Hehurthisbrainbystayingunderwater.C、Hewasdrownedinanicyriver.D、Hewastrap
随机试题
某一相流体的有效渗透率与绝对渗透率的比值叫()。
Generallyspeakingthegoalofforeignlanguageteachingistohelpthelearnermasterthe______languageintheshortestpossibl
ThenorthernpartsoftheUnitedStatesgetverycoldinthewinter.Itsnowsagreatdealandthetemperatureoftengoes【C1】___
在一般临时设施区内,配备灭火器的数量应满足()。
中国银监会有权对严重违法经营、经营管理不善的银行业金融机构予以()。
以下属于道德讨论中深入提问的策略的是()
公审公判被设计出来之初,是试图通过集中、公开的审判方式,借助国家司法力量的强制性和权威性,“震慑社会不良分子”和打击犯罪,同时也为了“彰显国家机关除暴安良、匡扶正义的决心”。然而,公审公判的实质是一种国家主义的崇拜。中国古代都有这样的传统,要公开行刑。国家
成语“厉兵秣马”中对“兵”的解释用的是它的()。(上海外国语大学2016)
请根据下图所示网络结构回答下列问题。如果将172.0.35.128/25划分为3个子网,其中第一个子网能容纳55台主机,另外两个子网分别能容纳25台主机,请写出子网掩码及可用的IP地址段。(注:请按子网顺序号分配网络地址)。
A、Itmakespeoplementallyill.B、Ithinderspeople’simprovement.C、Itgivespeopletoomuchstress.D、Itmakespeoplesuccessf
最新回复
(
0
)