单项选择题

According to Dr. Sacco,______.

A．different wines work differently on drinkers at stroke risk
B．nondrinkers should also consume a moderate amount of alcohol
C．drinkers should keep to one kind of alcohol to ward off strokes
D．moderate alcohol consumption protects against strokes

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单项选择题

The new study conducted by Dr. Sacco and his colleagues is unique in that ______.

A．it refutes early studies on the protective effect of moderate drinking against heart attacks
B．it confirms early studies of moderate drinking against heart attacks
C．it helps to resolve the disputes over the effect of moderate drinking against strokes
D．it finds that moderate drinking can benefit people of different races equally well

单项选择题

Which of the following statements is TRUE about the effect of drinking against strokes

A．Moderate drinking protects against heart attacks and strokes in different ways.
B．Even heavy drinkers suffer less chance of a stroke than nondrinkers.
C．Alcohol works only on patients who suffer clot-type strokes
D．White people are more likely to benefit from moderate drinking than nonwhites.