单选题
There is a great deal of controversy within the medical
profession regarding the use and value of the coronary bypass procedure, and for
more than eight years the American Heart Association has discussed the question
at its regular scientific sessions. The bypass operation
consists of open heart surgery in which the physician takes a vein from the
patient's leg and implants it near the heart to construct a passage around the
blockage in a clogged artery so that blood can flow freely by. The operation
performed on about 100,000 persons a year in the US and costs approximately
$10,000. The procedure is designed to relieve tie pain of angina pectoris which
occurs when the blood supply's obstructed and also to allow the patient more
freedom of sustained activity. In persons with advanced heart
disease and blockage in several arteries, the bypass operation is considered by
most doctors to be the preferable means of prolonging life. In the case of those
with a less advanced disease, or where only one artery is involved, the
advisability of the procedure is much more controversial. The operation doesn't
cure the disease that caused the blocked artery in the first place. According
to some studies, somewhere around half of the patients have another blocked
artery within five years, and in some cases even within one year.
There is of course a mortality rate in any major operation which varies
from physician to physician and hospital to hospital. The danger to the patient
is greatly increased if he is in generally poor condition, very advanced in age,
or suffering from some serious or debilitating illness. It is essential that the
operation be performed by a skilled surgeon knowledgeable about this particular
technique and in a hospital with the best possible facilities for his
use.
单选题
What is the text revealing?
A. How to make the coronary bypass operation.
B. An objective introduction of the coronary bypass operation.
C. The controversy within the medical profession on the coronary bypass
procedure.
D. A complete refusal of coronary bypass operation
【正确答案】
B
【答案解析】
单选题
A coronary bypass is an operation______.
A. to replace the blocked artery with a new one
B. to construct a passage around a blocked artery
C. to cut off the blocked artery
D. to take a vein from the patient's leg
【正确答案】
B
【答案解析】
单选题
Many doctors believe that the bypass operation______.
A. is a better way of prolonging one's life
B. is the only solution to the blockage of one artery
C. should be used to prevent advanced diseases
D. has no effect at all on serious patients
【正确答案】
A
【答案解析】
单选题
What is the result of the bypass operation?
A. The patient is relieved of pain.
B. The patient's artery condition is improved considerably.
C. The patient has a 50% chance of undergoing another operation within five
years.
D. The patient won't suffer from heart disease any more.
【正确答案】
C
【答案解析】
单选题
It is better that the bypass operation be performed______.
A. by a skilled surgeon
B. in a hospital with good facilities
C. while the patient is not suffering from other serious illnesses
D. when the patient is in very poor health condition