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
The complications frequently accompanying diabetes, such as impairment of vision and of kidney function, are now thought to resu
The complications frequently accompanying diabetes, such as impairment of vision and of kidney function, are now thought to resu
admin
2020-12-14
110
问题
The complications frequently accompanying diabetes, such as impairment of vision and of kidney function, are now thought to result from the lack of continuous control of blood glucose concentrations. The healthy pancreas, in response to increases in blood glucose concentration, releases small quantities of insulin throughout the day and thereby maintains the concentration within physiological limits(nomoglycemia). But the diabetic generally receives only one large dose daily. The diabetic’ s blood glucose concentration can thus fluctuate greatly during the interval between doses, and it has been suggested that the complication result from the periods of high concentrations of blood glucose(hyperglycemia). Many investigators thus believe that restoration of normoglycemia might halt the progression of such complications and perhaps even reverse them.
There are three primary techniques that have been investigated for restoration of normoglycemia. They are: transplantation of whole, healthy pancreases; transplantation of islets of Langerthan, that portion of the pancreas that actually secretes insulin, and implantation of artificial pancreases. There has, in fact been a great deal of success in the development of these techniques and each seems, on the whole, promising. Nonetheless, it will undoubtedly be many years before any one of them is accepted as a treatment for diabetes.
To many people, the obvious approach would seem to be simply to transplant pancreases from cadavers in the same manner that kidneys and other organs are routinely transplanted. That was the rationale in 1966 when the first recorded pancreas was performed. Between 1960 and 1975, there were forty-six pancreas transplants in forty-five other patients in the United States and five other countries. But only one of these patients is still alive with a functioning graft and surgeons have found that the procedure is not simple as they once thought.
The surviving patient has required no insulin since the operation. Another patient survived 638 days without requiring insulin. And one patient survived a transplantation for more than a year, but died when he chose not to take immunosuppressive drugs. These results, though meagre, suggest that the procedure has the potential for success.
The rest of the patients, however, either rejected the transplant or died within a short period. There does not appear to be any technical problem with the procedure. Rather, most of the patients were already so severely debilitated by the complications of diabetes that they could not withstand the surgery and the immunosuppressive regimen required to prevent rejection. More than half of the patients, furthermore, also required a kidney transplant. Most investigators now agree that the simultaneous transplantation of both organs is too great a shock to the patient and greatly increases the total risk.
The text suggests that the author considers the data concerning the success of pancreas transplants to be______.
选项
A、invalid
B、indirect
C、inaccurate
D、insufficient
答案
D
解析
细节题。根据success of pancreas transplants定位到第四段These results,though meagre,suggest that the procedure has the potential for success.“这些结果,尽管为数不多,可也表明了手术过程有潜在成功的可能。”可知作者认为胰腺移植手术成功的数据不充分,和选项D的表述一致。所以答案选D。
转载请注明原文地址:https://kaotiyun.com/show/G8P7777K
0
大学英语六级
相关试题推荐
RichChildrenandPoorOnesAreRaisedVeryDifferently[A]ThelivesofchildrenfromrichandpoorAmericanfamilieslookmore
A、Theywereexpensive.B、Noonebelievedthem.C、Theywereunsuccessful.D、Theywereoftennotwelcomed.C录音提到,第一代的绿色广告因为市场营销不佳,
A、Generatedifferentspeeches.B、Identifyobjectsinpictures.C、Improveroadconditions.D、Reproducehumanbrains.B录音提到,认知计算机系
A、Tostarttheschoolearlier.B、Toimprovethelivesofchildren.C、Tostopchildrenfromusingcellphones.D、Toputbackscho
A、Itcanreducethenumberofpassengercomplaints.B、Itcanmakeairtravelmoreentertaining.C、Itcancutdowntheexpensesf
A、Smallquarrelsdonotharmtheirhealth.B、Smallquarrelsaregoodforacloserelationship.C、Theyknowtheycouldcountone
A、Delegationisatickettoforeigntrade.B、Managersshouldn’tmerelybea"doer".C、Leadershipisabornability.D、Delegation
Itmaycomeasasurprisetomanyanexhaustedmotherorfather—butthinkingaboutyourchildrencouldimproveyourmemory,ast
Itmaycomeasasurprisetomanyanexhaustedmotherorfather—butthinkingaboutyourchildrencouldimproveyourmemory,ast
Peopleatthelowerendoftheincomescaletakemorepleasureintheirrelationshipsandenjoycaringforandconnectingwitho
随机试题
补阳还五汤的君药是
以下哪种元素缺乏会引发眦部睑缘炎
玉屏风颗粒除益气、固表之外。还能
病原体进入人体后是否引起疾病,主要取决于
党内监督的实质是()。
史官司马迁在《史记·孟尝君列传》中记述了齐国的孟尝君善于收揽人才,士人都愿意投奔他。改革家王安石在《读孟尝君传》中认为孟尝君不过是鸡鸣狗盗之徒的首领罢了,提出“鸡鸣狗盗之徒”不配“士”之称号。司马迁与王安石对孟尝君认识的区别表明()。
Marriageis,formanypeople,theirmostimportantrelationship,thesourceofmuchhappiness,and,forsome,evenaddsextraye
下列指令中,不影响标志寄存器CF的是( )。
Internet是一个覆盖全球的大型互联网络,它用于连接多千远程网与局域网的互连设备主______。
Aco-educationalschoolofferschildrennothinglessthanatrueversionofsocietyinminiature.Boysandgirlsaregiventhe
最新回复
(
0
)