题目内容
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提问人：网友lanpishu
发布时间：2022-01-07
[主观题]
The building up of fat in the arteries can the flow blood, and a heart attack or stroke.
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American doctors working in France have used laser light beams to treat patients withheart disease Heart disease kills more people in industrial countries than, any. other dis-ease. A major form. of heart disease is arteriosclerosis or thé narrowing and hardening ofthe arteries that carry blood to the heart. When a person suffers from severe arteriosclerosis. fatty materials build up in his or her arteries. This build-up blocks the flow of blood,reducing the heart s blood supply. If the hearts blood supply becomes dangerously low orblocked completely by a blood clot, the patient will have a heart attack. More than 600,000 Americans die every year from heart attack caused by blocked arteries. American doctors from Seaton Medical Center in California used laser light beams to destroy material blocking. thearteries of four French heart,patients.The scientists triedthe new laser technique after they were invited to do so by doctors from Pupan Hospital inToulouse. France. It was the first time that doctors had used the intense, powerful beamsof laser light to burn through and destroy substances blocking human arteries. The doctors first made a small cut through the patients skin into the heart artery that wasblocked. They then placed a long plastic tube through the cut into the artery until the endof the tube reached the blocked area. The tube contained tiny fibers of glass through whichthe laser light could travel. Doctors fired a laser machine outside the patients body. Thepowerful light traveled through the tube to destroy the blood clots and fat that were blocking the artery. Doctor Daniel Choy. the American doctor who led the team, said the scientists examined three of four patients treated 25 days after the laser operation. in one patient, the artery had remained unblocked. but in the other two patients, the arteries hadelosed up again after the treatment Dr. Choy said he does not know if the new laser treat-ment might someday replace medical operations now used to treat arteriosclerosis patients.He said more study is needed before scientists will really know if the new method is safeand effective. The American government has not yet given doctors permission to use thelaser treatment on human heart patients in the United States.
Why is arteriosclerosis more dangerous than other diseases？
A.Because the patient’s artery will narrow when ht、stuffers from it.
B.Because the patient’s artery will harden when hr suffers from it.
C.Because the patient’s artery will widen when he suffers from it.
D.Because the fatty materials in the patient artery wilt block the flow of blood so it will reduce the hearth blood supply.
Why do ihe American doctors think of using laser light to treat heart disease？A.Because laser light is quite powerful.
B.Because laser light is penetrating
C.Because laser light can destroy the blocking materials in human’s artory
D.Because laser light can travel through the human body.
Based on the la？er operation treatment of three patients, what can we infer from the passage？A.Laser light treatment is safe and effective
B.Laser light treatment is dangerous and ineffective
C.Laser light treatment still requires much more studies
D.Government should encourage doctors to do resenrch of laser light treatment on the human body.
What’s the main idea of the passage？A.leaser light treatment of heart disease should take the place of the traditional operation.
B.Laser light treatment has been proved belter and more trffccJivc than the tradilional operation.
C.More advanced technology should be encouraged to try on
D.Laser light treatment of heart disease still needs more research
