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(1)Moderate drinking reduces stroke risk, study confirms. Similar to the way a drink or two a day protects against heart attacks
(1)Moderate drinking reduces stroke risk, study confirms. Similar to the way a drink or two a day protects against heart attacks
admin
2016-12-06
36
问题
(1)Moderate drinking reduces stroke risk, study confirms. Similar to the way a drink or two a day protects against heart attacks, moderate alcohol consumption wards off strokes, a new study found.
(2)The study also found that the type of alcohol consumed—beer, wine or liquor—was unimportant. Any of them, or a combination, was protective, researchers reported in the Journal of the American Medical Association recently. "No study has shown benefit in recommending alcohol consumption to those who do not drink", cautioned the authors, led by Dr. Ralph L. Sacco of Columbia University College of Physicians and Surgeons in New York. But the hew data support the guidelines of the National Stroke Association, which say moderate drinkers may protect themselves from strokes by continuing to consume alcohol, the authors said.
(3)The protective effect of moderate drinking against heart attacks is well established, but the data has been conflicting about alcohol and strokes, the authors said. The new study helps settle the question and is the first to find blacks and Hispanics benefit as well as whites, according to the authors. Further research is needed among other groups, such as Asians, whose past studies suggest they may get no stroke protection from alcohol or may even be put at great risk.
(4)Among groups where the protective effect exists, its mechanism appears to differ from the protective effect against heart attacks, which occurs through boosts in levels of so-called "good" cholesterol, the authors said. They speculated alcohol may protect against stroke by acting on some other blood trait, such as the tendency of blood platelets to accumulate, which is key in forming the blood clots that can cause strokes.
(5)The researchers studied 677 New York residents who lived in the northern part of Manhattan and had strokes between July 1, 1993 and July 1, 1997. After taking into account differences in other factors that could affect stroke risk, such as high blood pressure, the researchers estimated that subjects who consumed up to two alcoholic drinks daily were only half as likely to have suffered clot-type strokes as nondrinkers. Clot-type strokes account for 80 percent of all strokes, a leading cause of US deaths and disability. Stroke risk increased with heavier drinking. At seven drinks per day, risk was almost triple that of moderate drinkers.
How does moderate alcohol consumption most probably protect us from strokes?
选项
A、By enhancing the level of the good cholesterol.
B、By reducing the possibility of the blood platelets to deposit.
C、By reducing the number of blood platelets and blood clots.
D、By enhancing the quality of overall blood traits.
答案
B
解析
第4段第1句有mechanism一词,表明本段可能讲述适度酒精能防止中风的机制。该段最后一句表明如果blood platelets会沉淀堆积,然后形成blood clots,最终导致stroke,由这一连串的因果关系可推断:要想防止中风,就要防止blood platelets的沉淀堆积,可见,本题应选B。
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0
专业英语四级
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