题目内容
Heart Attack In the United States, and especially in big cities and rural areas, tens of thousands of people with hearts that should be good 【51】 to keep them alive die each year for lack of adequate first aid. In New York City, for example, a new study has shown that only one person in 100 outside of hospitals 【52】 after the heart suddenly stops pumping. In contrast, in Seattle, the survival 【53】 after such heart attacks is one in five. "The difference can be traced 【54】 the effectiveness of the chain of survival", Dr. Joseph P. Ornato said. " Each link in the 【55】 must be strong enough for many lives to be 【56】 ". The chain begins with an immediate telephone 【57】 for emergency help and the start within four minutes of the process needed for restarting the 【58】 working, by a family member or bystander (旁观者). It continues with the prompt arrival-------within eight 【59】 ten minutes of a rescuer equipped with a special instrument that can shock the heart back to a normal rhythm. And it ends with the administration (给予, 实施) of advanced (先进) emergency care by nurses to maintain the heart’’s ability to survive until the doctors at the hospitals can take 【60】 When one or more links in this chain fail or function too slowly, the 【61】 of a victim surviving heart attack falls rapidly. Because of widespread weaknesses in the chain of 【62】 , experts in emergency heart care estimate that 20,000 to 80,000 people 【63】 needlessly of heart attack each year, a number comparable to the 55,000 killed annually in automobile 【64】 . One expert says, "Sending an emergency vehicle to a heart attack victim, 【65】 the special equipment is like having policemen with guns but no bullets. They may put on a good show, but they lack the weapon needed to get the job done."
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Heart Attack In the United States, and especially in big cities and rural areas, tens of thousands of people with hearts that should be good 【51】 to keep them alive die each year for lack of adequate first aid. In New York City, for example, a new study has shown that only one person in 100 outside of hospitals 【52】 after the heart suddenly stops pumping. In contrast, in Seattle, the survival 【53】 after such heart attacks is one in five. "The difference can be traced 【54】 the effectiveness of the chain of survival", Dr. Joseph P. Ornato said. " Each link in the 【55】 must be strong enough for many lives to be 【56】 ". The chain begins with an immediate telephone 【57】 for emergency help and the start within four minutes of the process needed for restarting the 【58】 working, by a family member or bystander (旁观者). It continues with the prompt arrival-------within eight 【59】 ten minutes of a rescuer equipped with a special instrument that can shock the heart back to a normal rhythm. And it ends with the administration (给予, 实施) of advanced (先进) emergency care by nurses to maintain the heart’’s ability to survive until the doctors at the hospitals can take 【60】 When one or more links in this chain fail or function too slowly, the 【61】 of a victim surviving heart attack falls rapidly. Because of widespread weaknesses in the chain of 【62】 , experts in emergency heart care estimate that 20,000 to 80,000 people 【63】 needlessly of heart attack each year, a number comparable to the 55,000 killed annually in automobile 【64】 . One expert says, "Sending an emergency vehicle to a heart attack victim, 【65】 the special equipment is like having policemen with guns but no bullets. They may put on a good show, but they lack the weapon needed to get the job done."
I was not here just now．I was ________ ________ ________ ________.
Interferon For several years, scientists have been testing a substance called interferon (干扰素),a potential wonder drug that is proving to be effective in treating a variety of ailments, including virus infections, bacteria infections, and tumors. To date, the new drug has provoked no negative reaction of sufficient significance to discourage its use. But in spite of its success, last year only one gram was produced in the entire world. The reason for the scarcity lies in the structure of interferon. A species specific protein, the interferon produced from one animal species cannot be used in treating another animal species. In other words, to treat human beings, only interferon produced by human beings may be used. The drug is produced by infecting white blood cells with a virus. Fortunately, it is so potent that the amount given each patient per injection is very small. Unlike antibiotics(抗菌素), interferon does not attack germs directly. Instead, it makes unaffected cells resistant to infection, and prevents the multiplication of viruses within cells. As you might conclude, one of the most dramatic uses of interferon has been in the treatment of cancer. Dr. Hans Strander, research physician at Sweden’’s famous Karolinska Institute, has treated more than one hundred cancer patients with the new drug. Among a group of selected patients who had undergone surgical procedures for advanced cancer, half were given conventional treatments and the other half were given interferon. The survival rate over a three-year period was 70 percent among those who were treated with interferon as compared with only 10 to 30 percent among those who had received the conventional treatments. In the United States, a large-scale project supported by the American Cancer Society is now underway. If the experiment is successful, interferon could become one of the greatest medical discoveries of our time. The result of Dr. Stranders experiments with interferon is that 70 percent among patients who were treated with interferon survived.
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