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
2016-04-30
35
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/yCG7777K
0
大学英语六级
相关试题推荐
SevenStepstoaMoreFulfillingJobA)Manypeopletodayfindthemselvesinunfulfillingworksituations.Infact,oneinfourw
A、Homeeconomics.B、Businessadministration.C、Computerprogramming.D、Historicalresearch.B推理题。四个选项都是职业类别,可推测对话涉及的是对话中的人所从事的职业
Learningisanessentialprocessforlivingthingstoacquirenecessaryskillsandbehaviors.Scientistshavealreadyfoundthat
Thereasonfruitsandvegetablesaresoimportanttoyouroverallhealthisthattheyaremajorpurveyorsofantioxidants.A
Thereasonfruitsandvegetablesaresoimportanttoyouroverallhealthisthattheyaremajorpurveyorsofantioxidants.A
WhenIwasachild,myteethusedto【B1】______inseveraldifferentdirections,and【B2】______thatinvolvedratherexpensive【B3】__
Mostpeopledon’tenjoyfacingthedifficultsituationsthatsometimesoccurwithcoworkersintheworkplace.Suchsituationsma
A、Over87,000workerswilllosetheirjobsinautocompanies.B、Manypeoplewillhavetosaybye-byetotheirhighsalaries.C、T
Negotiationsworkwonders.Thisisparticularlysoininternationalbusinesssinceitismostlythroughnegotiationsthatexport
Ahappymarriageapparentlyisgoodmedicine,buthostilespousesmay【B1】______oneanother’shealth.Couplesinconflict-ridden
随机试题
A磺胺嘧啶;B诺氟沙星;C两者均是;D两者均不是;具有酸碱两性性质的是;
急性感染性多发性神经根炎,危及生命的主要原因
华佛综合征肢端肥大症
《普通住宅小区物业管理服务等级标准》各等级服务分别由()等主要内容组成。
关于负债分析的表述中,()是正确的。
甲公司准备投资100万元购入由A、B、C三种股票构成的投资组合,三种股票占用的资金分别为20万元、30万元和50万元,即它们在证券组合中的比重分别为20%、30%和50%,三种股票的贝塔系数分别为0.8、1.0和1.8。无风险收益率为10%,股票市场的平均
企业制度主要是指以产权制度为基础和核心的企业产权制度与管理制度。()
对于全体人民,_______对于农村贫民,一个很重要的改善,就是孩子上学不花钱。_______让所有孩子上学不花钱,人民_______能不再像现在这样没有文化,_______不再完全没有文化。填入画横线部分最恰当的一项是()。
APEC
Linux交换分区的作用是(62)。
最新回复
(
0
)