华南师范大学
One afternoon while she was preparing dinner in her kitchen, Anne Peters, a 32-year-old American housewife, suddenly had severe pains in her chest accompanied by shortness of breath. Frightened by the thought that she was having a heart attack, Anne screamed for help. Her husband immediately rushed Anne to a nearby hospital where her pains were diagnosed as having been caused by panic, and not a heart attack.More and more Americans nowadays are having panic attacks like the one experienced by Anne Peters. Benjamin Crocker, a psychologist at the University of Southern California, reveal that as many as ten million adult Americans have already experienced or will experience at least one panic attack in their lifetime. Moreover, studies conducted by the National Institute of Mental Health in the United States disclose that approximately 1.2 million adult individuals are currently suffering from severe and recurrent panic attacks.These attacks may last for only a few minutes; some, however, continue for several hours. The symptoms of panic attacks bear such remarkable similarity to those of heart attacks that many victims believe that they are indeed having a heart attack.Panic attack victims show the following symptoms: they often become easily frightened or feel uneasy in situations where people normally would not be afraid; they suffer shortness of breath, experience chest pains, a quick heartbeat, sudden fits of trembling, a feeling that persons and things around them are not real; and most of all, a fear of dying or going crazy. A person seized by a panic attack may show all or as few as four of these symptoms.There has been a lot of explanations as to the causes of panic attacks. Many claim that psychological stress could be a logical cause, but as yet, no evidence has been found to support this theory. However, studies show that more women than men experience panic attacks and people who drink a lot as well as those who use drugs are more likely to suffer attacks.It is reported that there are at least three signs that indicate a person is suffering from a panic attack rather than a heart attack. The first is age. People between the ages of 20 and 30 are more often victims of panic attacks. The second is sex. More women suffer from recurrent panic attacks than men. The third is the multiplicity of symptoms. A panic attack victim usually suffers at least four of the previously mentioned symptoms, while a heart attack victim often experiences only pain and shortness of breath.It is generally agreed that a panic attack does not directly endanger a person's life. All the same, it can unnecessarily disrupt a person's life by making him or her so afraid of having a panic attack in a public place that he or she may refuse to leave home and may eventually become isolated from the rest of society. Dr. Crocker's advice to any person who thinks her is suffering from a panic attack is to consult a doctor for a medical examination to rule out the possibilities of physical illness first. Once it has been confirmed that he or she is, in fact, suffering from panic attack, the victim should seek psychological and medical help.1.According to the passage, panic attack is(  ).2.One factor both panic and heart attacks have in common is(  ).3.It is indicated in the last paragraph that panic attack may(  ).4.Dr. Crocker suggests that for panic attack sufferers,(  ).
The world's last known case of smallpox was reported in Somalia, the Horn of Africa, in October 1977. The victim was a young cook called Ali Maow Maalin. His case becomes a landmark in medical history, for smallpox is the first communicable disease ever to be eradicated.The remarkable campaign to free the world of smallpox has been led by the World Health Organization. The Hom of Africa, embracing the Ogaden region of Ethiopia and Somalia, was one of the last few smallpox ridden areas of the world when the WHO-sponsored Smallpox Eradication Programme (SEP) got underway there in 1971.Many of the 25 million inhabitants, mostly farmers and nomads living in a wildness of desert, bush and mountains, already had smallpox. The problem of tracing the disease in such formidable country was exacerbated further by the continuous warfare in the area.The programme concentrated on an imaginative policy of "search and containment." Vaccination was used to reduce the widespread incidence of the disease, but the success of the campaign depended on the work of volunteers. These were men paid by the day, who walked hundreds of miles in search of "rumors"—--information about possible smallpox cases.Often these rumors turned out to be cases of measles, chicken pox or syphilis—-but nothing could be left to chance. As the campaign progressed the disease was gradually brought under control. By September 1976 the SEP made its first report that no new cases had been reported. But that first optimism was short-lived. A three-year-old girl called Amina Salat, from a dusty village in the Ogaden in the south-east of Ethiopia, had given smallpox to a young nomad visitor. Leaving the village the nomad had walked across the border into Somalia. There be infected 3,000 people, and among them had been the cook, Ali. It was a further 14 months before the elusive "target zero"—no further cases—was reached.Even now, the search continues in "high risk" areas and in parts of the country unchecked for some time. The flow of rumors has now diminished to a trickle—but each must still be checked by a qualified person.Victory is in sight, but two years must pass since the " last case" before an International Commission can declare that the world is entirely free from smallpox.1.Ali Maow Maalin’s case is significant because he was the(  ).2.The work to stamp out smallpox was made more difficult by(  ).3.The volunteers mentioned were paid to(  ).4.Nowadays, smallpox investigations are only carried out(  ).
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