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2015年職稱英語考試衛生類A級閱讀判斷鞏固練習題9

發表時間：2014/6/5 9:05:35 來源：互聯網點擊關注微信：

Dangers Await Babies with Altitude

Women who live in the world’s highest communities tend to give birth to under-weight babies, a new study suggests. These babies may grow into adults with a high risk of heart disease and strokes.1

Research has hinted that newborns in mountain communities are lighter than average. But it wasn’t clear whether this is due to reduced oxygen levels at high altitude or because their mothers are under-nourished — many people who live at high altitudes are relatively poor compared with those living lower down.

To find out more, Dino Giussani and his team at Cambridge University studied the records of 400 births in Bolivia during 1997 and 1998. The babies were bom in both rich and poor areas of two cities: La Paz and Santa Cruz. La Paz is the highest city in the world, at 3.65 kilometers above sea level, while Santa Cruz is much lower, at 0.44 kilometers.

Sure enough, Giussani found that the average birthweight of babies in La Paz was significantly lower than in Santa Cruz. This was true in both high and low-income families. Even babies bom to poor families in Santa Cruz were heavier on average than babies born to wealthy families in lofty La Paz. “We were very surprised by this result,” says Giussani.

The results suggest that babies born at high altitude are deprived of2 oxygen before birth. “This may trigger the release or suppression of hormones that regulate growth of the unborn child.3 ‘‘ says Giussani.

His team also found that high-altitude babies tended to have relatively larger heads compared with their bodies4. This is probably because a fetus starved of oxygen will send oxygenated blood to the brain in preference to the rest of the body5.

Giussani wants to find out if such babies have a higher risk of disease in later life. People born in La Paz might be prone to heart trouble in adulthood, for example. Low birthweight is a risk factor for coronary heart disease. And newborns with a high ratio of head size to body weight are often predisposed to high blood pressure and strokes in later life.

詞匯：

altitude /'?lt?tju?d/ n.緯度，(海拔)高度

birthweight /'b?:θ,weit/n. 出生體重

underweight /?nd?'we?t/ adj.體重不足的

hormone /'h??m??n/n. 荷爾蒙

stroke /str??k/ n.中風

coronary /'k?r(?)n(?)r?/ adj. 冠狀的

hint /h?nt/ vt.暗示

fetus /'fi?t?s/n. 胚胎

under-nourished/'?nd? 'n?r??t/ adj.營養不足的

注釋：

1.These babies may grow into adults with a high risk of heart disease and strokes.這些嬰兒長大成人后得心臟病和中風的風險很大。

2.be deprived of: 被剝奪了……，缺乏……

3.This may trigger the release or suppression of hormones that regulate growth of the unborn child. 這可能會觸發調節未出生兒成長的荷爾蒙的釋放或抑制。這里的release是名詞。

4.relatively larger heads compared with their bodies:相對身體來說較大的頭部

5.a fetus starved of oxygen will send oxygenated blood to the brain in preference to the rest of the body: 一個缺氧的胚胎會優先把充氧的血液輸送到腦部,然后才送到身體的其他部位。starved of 是分詞短語,修飾fetus, in preference to 表示“優先于……”，如:I chose to study English in preference to Russian in university.讀大學時,我選了英語,而不是俄語。

練習：

1.According to the passage, one of the reasons why newborns in mountain communities are underweight is that their mothers are underweight.