Antioxidants (抗氧化剂) in coffee are thought to help protect against stroke — but too much must raise b
英语试题 08-21
Antioxidants (抗氧化剂) in coffee are thought to help protect against stroke — but too much must raise blood pressure, which increases the risk, according to Japanese researchers. Similarly, green tea could also be beneficial for preventing the shocking event, caused when a blood vessel(血管) in or serving the brain is blocked.
The study looked at the drinking habits of more than 83,000 healthy adults, aged 45 to 74, whose health was tracked for 13 years on average. They found that people who drank at least one cup of coffee a day had about a 20 percent lower risk of stroke, compared to those who rarely drank it. To get an equal effect, about four cups of green tea a day were required.
All results were adjusted to take into account differences between the groups in age composition, gender, smoking, alcohol, weight, diet and exercise. Dr. Yoshihiro Kokubo, lead author of the study, published in the journal Stroke, said, “The regular action of drinking tea and coffee, largely benefits cardiovascular (心脏血管的) health.”
Their results for coffee were similar to that of “study of studies”， presented at a European conference, which found that one to three cups a day was associated with a 14 percent reduction. For three to six cups, there appeared to be a similar but weaker association, but there was no benefit from drinking six or more.
Exactly why coffee and green tea appears to lower stroke risk is unclear, although antioxidants are thought to be at work. However, the science is by no means cut and dried. Caffeine raises blood pressure, and there have been indications that too much coffee can raise stroke risk because of this.
Dr. Dale Webb, from the Stroke Association said, “We welcome this study which suggests that the benefits of antioxidants in coffee and green tea may offset the potential harm from caffeine.” He thought, the results show higher consumption of green tea and coffee might reduce the risks of stroke. “We would like to see further research to understand these findings，” he said.
28．What may lead to a stroke according to the first paragraph?
A．Higher blood pressure. B．Drinking a cup of coffee a day.
C．Blocked blood vessels in the brain. D．Antioxidants.
29．What can we infer from the passage?
A．The study mainly focuses on middleaged people.
B．Drinking one cup of coffee a day benefits health.
C．Those who seldom drink coffee are healthier.
D．Drinking tea contributes to stroke.
The study looked at the drinking habits of more than 83,000 healthy adults, aged 45 to 74, whose health was tracked for 13 years on average. They found that people who drank at least one cup of coffee a day had about a 20 percent lower risk of stroke, compared to those who rarely drank it. To get an equal effect, about four cups of green tea a day were required.
All results were adjusted to take into account differences between the groups in age composition, gender, smoking, alcohol, weight, diet and exercise. Dr. Yoshihiro Kokubo, lead author of the study, published in the journal Stroke, said, “The regular action of drinking tea and coffee, largely benefits cardiovascular (心脏血管的) health.”
Their results for coffee were similar to that of “study of studies”， presented at a European conference, which found that one to three cups a day was associated with a 14 percent reduction. For three to six cups, there appeared to be a similar but weaker association, but there was no benefit from drinking six or more.
Exactly why coffee and green tea appears to lower stroke risk is unclear, although antioxidants are thought to be at work. However, the science is by no means cut and dried. Caffeine raises blood pressure, and there have been indications that too much coffee can raise stroke risk because of this.
Dr. Dale Webb, from the Stroke Association said, “We welcome this study which suggests that the benefits of antioxidants in coffee and green tea may offset the potential harm from caffeine.” He thought, the results show higher consumption of green tea and coffee might reduce the risks of stroke. “We would like to see further research to understand these findings，” he said.
28．What may lead to a stroke according to the first paragraph?
A．Higher blood pressure. B．Drinking a cup of coffee a day.
C．Blocked blood vessels in the brain. D．Antioxidants.
29．What can we infer from the passage?
A．The study mainly focuses on middleaged people.
B．Drinking one cup of coffee a day benefits health.
C．Those who seldom drink coffee are healthier.
D．Drinking tea contributes to stroke.
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