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
Dr Thomas Starzl, like all the pioneers of organ transplantation, had to learn to live with failure. When he performed the world
Dr Thomas Starzl, like all the pioneers of organ transplantation, had to learn to live with failure. When he performed the world
admin
2010-07-06
65
问题
Dr Thomas Starzl, like all the pioneers of organ transplantation, had to learn to live with failure. When he performed the world’s first liver transplant 25 years ago, the patient, a three-year-old boy, died on the operating table. The next four patients didn’t live long enough to get out of the hospital. But more determined than discouraged, Starzl and his colleagues went back to their lab at the University of Colorado Medical School.
They devised techniques to reduce the heavy bleeding during surgery, and they worked on better ways to pre- vent the recipient’s immune system from rejecting the organ — an ever-present risk.
But the triumphs of the transplant surgeons have created yet another tragic problem: a severe shortage of donor organs. "As the results get better, more people go on the waiting lists and there’s wider disparity between supply and need," says one doctor. The American Council on Transplantation estimated that on any given day 15 000 Americans are waiting for organs. There is no shortage of actual organs; each year about 5 000 healthy people die unexpectedly in the United States, usually in accidents. The problem is that fewer than 20 percent become donors.
This trend persists despite laws designed to encourage organ recycling. Under the federal Uniform Anatomical Gift Act, a person can authorize the use of his organs after death by signing a statement. Legally, the next of kin can veto these posthumous gifts, but surveys indicate that 70 to 80 percent of the public would not interfere with a family member’s decision. The biggest roadblock, according to some experts, is that physicians don’t ask for donations, either because they fear offending grieving survivors or because they still regard some transplant procedures as experimental.
When there aren’t enough organs to go around, distributing the available ones becomes a matter of deciding who will live and who will die. Once donors and potential recipients have been matched for body size and blood type, the sickest patients customarily go to the top of the local waiting list. Beyond the seriousness of the patients’ condition, doctors base their choice on such criteria as the length of time the patient has been waiting, how long it will take to obtain an organ and whether the transplant team can gear up in time.
One factor causing death on organ transplantation is ______.
选项
A、heavy bleeding during surgery
B、destruction of patients’ immune system
C、objection from patients to taking organs of others
D、doctors’ lack of confidence
答案
A
解析
分析推理题。第一段最后一句指出,Dr Starzl和同事们开发了新技术来减少手术中的大出血并用更好的方法来防止受体免疫系统对器官的排斥。由上下文及常识可知大出血肯定是使接受器官移植手术者死亡的一个原因,选A 。其余三项都不对。
转载请注明原文地址:https://kaotiyun.com/show/PDDd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
IfyouarebuyingapropertyinFrance,whetherforapermanentoraholidayhome,itisimportanttoopenaFrenchbankaccount
EmployeesoftheTaffValeRailwayCompanyinSouthWalesgreasedthetracksandcuttelegraphwiresduringabitterstrikein1
InFrance,allschoolsfollowthesamebasiccurriculum.Therearequiteafewafter-schoolprogramsafter4:30pm.
EmployeesoftheTaffValeRailwayCompanyinSouthWalesgreasedthetracksandcuttelegraphwiresduringabitterstrikein1
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.ABCwilltry
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.AnABCexecut
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Somemembers
Quantumwillstillbeonairasthelastprogramsofitarestillinthemakingandaretobeshownasscheduled.Scienceprogr
Asmartmanoncesaidthattheonlythingnecessaryforthetriumphofevilisforgoodmentodonothing.So,asapoliceman,I
随机试题
肺痨出现骨蒸劳热日久不退,可选用
三极管反向饱和电流Icbo与发射极穿透电流Iceo之间的关系为(),β为电流放大倍数。
某孕妇,25岁,结婚3年,夫妇同居,未避孕,从未怀孕过,平素月经周期规律,现停经44天,在抬重物劳动时突感右下腹剧烈疼痛伴阴道点滴出血半天。体检:血压100/50mmHg,白细胞总数9.0×109/L。妇科检查见阴道内有少许暗红色血,宫颈举痛明显,后穹隆饱
患者男,12岁。因腹泻自服呋喃唑酮(痢特灵)6片,第2天尿呈浓茶色,第3天出现头晕、皮肤发黄来诊。检测WBC12.3×109/L,Hb61g/L,PLT正常;游离血红蛋白462mg/L;荧光点试验(+);高铁血红蛋白还原试验(+)。患者溶血性贫血的发病机制
患者女,47岁。高血压病史10余年,1月前因脑梗死入院。右侧偏瘫,查体见右侧上肢肌力1级,右侧下肢肌力3级。患者现生命体征平稳,意识清楚。肌力1级的表现为
结构实体混凝土强度通常()标准养护条件下的混凝土强度。
监控系统信息采集功能包括收集道路状况、()、紧急电话以及交通事故告警等信息。
资产负债表的数据来源,可以通过以下哪几种方式获得?()
下图所示是校园网某台主机使用浏览器访问某个网站,在地址栏输入其URL时用Sniffer捕获的数据包。请根据图中信息回答下列问题。该URL是【16】。
释放表单时,最后引发的事件是______。
最新回复
(
0
)