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Zinc锌 Can Cut Colds Short
Zinc isn't the cure for the common cold, but increasing evidence indicates it can be a big help. An analysis of three randomly controlled trials found that 70 per cent of patients who had taken zinc acetate lozenges（醋酸锌含片）(80 to 92 mg per day)within 24 hours of noticing cold
symptoms had recovered on the fifth day, compared with 27 per cent of patients who had received a placebo. While that dosage（安慰剂） is higher than the daily recommended amount, no serious side effects were observed. Be sure your zinc lozenge doesn't also contain citric acid(柠檬酸),which can make it less effective.
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Driving Can Lower Your IQ
In a recent study of approximately 500,000 people between ages 37 and 73, researchers found a noticeable drop-off in brainpower, as measured by intelligence and memory tests, among those who drove for more than two hours each day. The study also found that the more time participants spent watching TV, which, like driving, fails to exercise either the body or the brain, the worse their test scores. If you must drive long distances to work, consider adding a mentally stimulating activity to your journey work, such as listening to language lessons.
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Dairy Helps Fight Early Menopause(更年期)
Calcium and vitamin D have long been known to work together to build strong bones. Now scientists have discovered that they may also play a role in preventing early menopause, which is associated with an increased risk of osteoporosis（骨质疏松症）, heart disease and other health issues. In a study of 116,430 premenopausal women, those who got the most calcium and vitamin D from food-especially dairy-had the lowest risk of early menopause. Supplements did not have any beneficial effect, perhaps because they lack the other vitamins, fats and hormones found in dairy.
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21. What can lower the risk of early menopause？
A. Daily food containing most of the calcium and vitamin D.
B. Adding a mentally stimulating activity to your commute.
C. That people take a lot of food containing zinc.
D. That people suffer from osteoporosis.
22. Which of the following is True according to the passage?
A. Zinc can help treat any common cold effectively.
B. Language lessons are beneficial to mental activity.
C. Despite time participants spent watching TV, their test scores are still high.
D. Calcium is more functional than vitamin D in curing menopause.
23. What's the main purpose of the passage?
A. To sell some medicines to the customers.
B. To offer some statistics about scientific researches.
C. To inform readers of some pieces of medical news.
D. To promote some products about milk.
