20. What do you expect in the next paragraph after this passage.'?
A. Giving some nutrition advice to parents.
B. Explaining some disadvantages of eating fast foods.
C. Introducing some advantages of eating fast foods.
D. Criticizing parents for giving their children lunch money.
An occasional drink with dinner could reduce the risk of having a stroke ( 中 风 )
according to a new study. Researchers found that light to moderate drinkers can lower
their risk by about 20 percent compared with non-drinkers.
The study was the biggest ever to examine the link between alcohol and stroke. It
showed that as little as a single glass of wine or beer per week can significantly reduce
stroke risk. The study involved more than 22,000 men, but the researchers said the
results could also apply to women.
However, the researchers stressed it would be unwise for doctors to advise patients
who don't drink to suddenly start or those who drink small amounts to begin consuming
more heavily. The study found no added protection from stroke by drinking more than
lightly or moderately.
And researchers warned of possible harms posed by alcohol, such as liver damage,
the dangers of driving while drunk and the risk of breast cancer in women.
What's more, there are other ways to reduce stroke risk, such as quitting smoking or
lowering blood pressure.
Numerous studies have shown that modest drinking reduces the risk of heart disease.
But until now, the evidence of an effect on strokes has been less convincing. Early
studies were criticized because they simply compared drinkers to non-drinkers. This
latest study examined varying levels of alcohol intake. It found that between one drink a
week and one a day reduces the risk, and the lesser amount was about as good as the
higher one.
21. The study was the biggest ever because
A. it has been published lately
B. it involved more than 22,000 men
C. it provided some advice to doctors
D. the results could also apply to women
22. Which of the following ways is NOT mentioned in the passage to reduce stroke risk?
A. Giving up smoking.
B. Lowering blood pressure.
C. Drinking lightly and occasionally.
D. Taking medicine on time.
23. Alcohol does the following harm EXCEPT
A. resulting in liver damage
B. causing traffic accidents
C. lowering blood pressure
D. increasing the risk of breast cancer
24. The study is considered more successful because it