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问题 单项选择题 A1型题

营养性缺铁性贫血的正确预防措施是（）

A.提倡鲜牛奶喂养

B.提倡母乳喂养

C.多补充维生素B12

D.早产儿需早补锌

E.婴儿奶粉应强化钙剂

答案

参考答案：B

解析：因母乳中铁吸收利用率高，故提倡母乳喂养，同时亦要及时添加含铁丰富且铁的吸收率高的辅食，故选B，排除A。C、D、E对缺血性贫血无预防作用，故排除。

单项选择题

Passage Three


Being sociable looks like a good way to" add years to your life. Relationships with family, friends, neighbours ,even pets ,will all do the trick ,but the biggest longevity(长寿) boost seems to come from marriage or an equivalent relationship. The effect was first noted in 1858 by William Farr,who wrote that widows and widowers were at a much higher risk of dying than their married peers. Studies since then suggest that marriage could add as much as seven years to a man’s life and two to a woman’s. The effect holds for all causes of death, whether illness, accident or self-harm.
Even if the odds are stacked against you, marriage can more than compensate. Linda Waite of the University of Chicago has found that a married older man with heart disease can expect to live nearly four years longer than an unmarried man with a healthy heart. Likewise, a married man who smokes more than a pack a day is likely to live as long as a divorced man who doesn’t smoke. There’s a flip side, however, as partners are more likely to become ill or die in the couple of years following their spouse’s death, and caring for a spouse with mental disorder can leave you with some of the same severe problems. Even so, the odds favour marriage. In a 30-year study of more than 10,000 people, Nicholas Christakis of Harvard Medical School describes how all kinds of social networks have similar effects.
So how does it work The effects are complex, affected by socio-economic factors, health-service provision,emotional support and other more physiological (生理的)mechanisms. For example, social contact can boost development of the brain and immune system, leading to better health and less chance of depression later in life. People in supportive relationships may handle stress better. Then there are the psychological benefits of a supportive partner.
A life partner,children and good friends are all recommended if you aim to live to 100. The ultimate social network is still being mapped out, but Christakis says:" People are interconnected, so their health is interconnected. \

Linda Waite’s studies support the idea that______.

A．older men should quit smoking to stay healthy

B．marriage can help make up for ill health

C．the married are happier than the unmarried

D．unmarried people are likely to suffer in later life
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单项选择题

关于业载和航程之间的关系，下列说法正确的是（）

A、最大着陆重量基本上和最大无燃油重量相等

B、最大业载不受备用燃油的限制

C、业载会受到预计航程的限制
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