题目内容：

A new study suggests that people who drank a certain amount of alcohol（酒）had a lower risk of cancer and death than those who drank more or none during a nine-year period. And with each additional drink a week, the risk of cancer and death from any cause increased, the scientists reported.

However, the study found only an association between alcohol and cancer and death, and did not prove cause and effect, the researches said. What sets the new study apart, said lead study author Andrew Kunzmann, is that previous studies looked at cancer and death separately. “What our study does is combine the two outcomes together and we find that lighter drinking is associated with the lowest risk of cancer or death,” Kunzmann said.

But Kunzmann noted that the participants（参与者）were all older adults. That means that “we’re not really showing what happens in younger people if they drink,” he said. Also, it’s difficult to account for other lifestyles that could have affected the results. “These could also influence health. But the results did take into consideration differences in diet, smoking and education among participants,” Kunzmann noted.

The researchers said that they hope their study sparks conversation about reducing the suggested alcohol intake in countries’ guidelines. “We’re not telling people what they can or can’t do or what they can or can’t drink,” Kunzmann said. “We’re just trying to give them reliable evidence so that they can make their own informed, healthy decisions.”

1.What is the finding of the new study?

A. Nondrinkers are least likely to have cancer.

B. Drinking helps lower the risk of cancer.

C. Lighter drinking is helpful to health.

D. Heavy drinkers are at more risk.

2.Which of the following best explains “previous” underlined in Paragraph 2?

A. Future.    B. Present.

C. New.    D. Former.

3.What is the main idea of Paragraph 3?

A. The result is of little value.

B. The research has its limitations.

C. The participants are all adults.

D. The influence of diet is included.

4.What does the researchers suggest people do about drinking?

A. Make their own decisions.

B. Reduce the amount they drink.

C. Have additional drinks occasionally.

D. Drink according to the countries’ guidelines.