粪便潜血试验(occult blood test，OBT)

诊断早期胃癌最重要的检查是

A、血沉

B、血清癌胚抗原检测

C、胃镜检查

D、粪便潜血试验

E、X线钡餐检查

You have been badly injured in a car accident. It is necessary to give you a blood transfusion because you lost a great deal of blood in the accident. However, special care must be taken in selecting new blood for you. If the blood is too different from your own, the transfusion could kill you. There are four basic types of blood: A, B, AB, and O. A simple test can indicate a person's blood type, which, like hair color and height, is inherited from parents. Because of substances contained in each type, the four groups must be transfused carefully. Basically, A and B cannot be mixed. A and B cannot receive AB, but AB may receive A or B. O can give to any other group; hence, it is often called the universal donor. For the opposite reason, AB is sometimes called the universal recipient. However, because so many reactions can occur in transfusions, patients usually receive only salt or plasma (liquid) until their

1、A good title for this passage is ________.

A、Getting Blood and Plasma

B、Special Blood Types

C、Human Blood Types

D、The Blood Bank of a Hospital

2、The word "hence" in line 10 means _________

A、always

B、 often

C、 therefore

D、 seldom

3、In a blood transfusion, it is easiest to find the acceptable type of blood for a person with the blood type of ________

A、A

B、 B

C、 AB

D、 O

4、The purpose of using salt and plasma before a blood transfusion is to allow time ______.

A、to test the reactions to the transfusion

B、for matching the blood to be transfused with the patient's blood

C、 for the blood to be delivered from the blood bank

D、 to select a new type of blood for the patient

5、Most Europeans have blood type _________

A、A

B、B

C、O

D、A or O

便潜血试验(OBT)

痔疮

A.大便潜血试验持续阳性

B.柏油样黑便

C.排便后滴鲜血，血存粪便表面

D.白陶土样便

E.黏液脓血便

关于粪便潜血，叙述不正确的是

A、正常无潜血的粪便不呈现颜色反应

B、呈现蓝色反应为阳性

C、蓝色出现越早，表明粪便内的潜血也越多

D、粪中肉眼看不出的血液称为潜血

E、食肉动物不用禁食检验

粪便潜血试验阳性，消化道出血至少为

A．2ml

B．10ml

C．6ml

D．5ml

E．15ml

粪便呈黑色，但潜血试验阴性，见于（ ）。

筛选胃癌的首选方法是

A、血沉

B、血清癌胚抗原检测

C、胃镜检查

D、粪便潜血试验

E、X线钡餐检查

有助确诊的常用检查为

A．血培养

B．粪便找阿米巴滋养体

C．粪便培养

D．胸部X线片

E．粪便潜血试验