Sudden Infant Death Syndrome Understandably, Margo Parisi wanted to take every possible step to reduce the risk that her new

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问题                     Sudden Infant Death Syndrome
    Understandably, Margo Parisi wanted to take every possible step to reduce the risk that her new born son, Luca, would die of Sudden Infant Death Syndrome (SIDS). So the mom followed the "Back to Sleep" guidelines from the National Institute of Child Health and Human Development (NICHD) , putting Luca to sleep on his back, shunning blankets and pillows and keeping the temperature cool. She also turned on the ceiling fan; she had read a newspaper article that said researchers were investigating whether that might help. After all, she had read a newspaper article that said researchers were investigating whether that might help. After all, she and her husband already had the fan. "It’s cheap and easy; not going to harm the baby," she says,"it’s one more thing you can do as a parent that can prevent something horrible from happening." So far all the precautions have paid off: at 14 weeks, Luca is happy and healthy.
    Parisi is one of a growing number of parents taking measures to reduce the risk of SIDS—defined as " the sudden death of an infant under 1 year of age, which remains unexplained after a thorough case investigation, including performance of a complete autopsy, examination of the death scene, and review of the clinical history. "In fact, the campaign to educate people about the syndrome has been so successful that infant deaths due to SIDS have been cut in half since the NICHD introduced its Back to Sleep campaign in 1994. Nonetheless, each year SIDS kills about 2, 300 U. S. babies, about one infant out of every 2, 000 live births, according to the American SIDS Institute. Three new studies published today look at how that number might be further reduced.
    In the October issue of the Archives of Pediatric & Adolescent Medicine, researchers looked at whether the use of a fan in the room where a baby sleeps can help reduce the incidence of SIDS. In in-person interviews, they questioned mothers of 185 California babies who died of SIDS and the mothers of 312 randomly selected "control" infants matched by country, race, ethnicity and age to the first group. Researchers found that infants who slept in rooms ventilated by fans had a 72 percent lower risk of SIDS compared to infants who slept in bedrooms without fans. Using a fan appeared be most effective with infants in high-risk environments, such as those sleeping in overheated rooms or on their stomachs. Researchers hypothesize that fans may improve ventilation and decrease the chance that babies will rebreathe exhaled carbon dioxide.
    The two other new studies focused on how parents and caregivers are implementing existing guidelines for reducing SIDS deaths. While the campaign to have babies sleep on their backs has been very successful, the message isn’t getting to everyone. A study in a special supplement to the journal Pediatrics revealed that at 3 months of age (the peak for SIDS is 2 to 4 months of age), 25 percent of parents are still not following recommendations. Athird of parents were sharing a bed with their their babies at that age, again contrary to the guidelines.
The research in paragraph 3 is mentioned to prove that______.

选项 A、to use a fan seemed to be effective for infants in high-risk environments
B、control infants are matched by country, race, ethnicity and age to the first group
C、fans improve ventilation and decrease the chance of rebreathing exhales carbon dioxide
D、using a fan in high-risk environments, infants will no longer die of SIDS

答案A

解析 推理判断题。根据题干提示定位至第三段。根据本段第一句可知,这一研究是围绕“在婴儿睡觉的房间里使用风扇是否能够有助于减少婴儿猝死综合征的发生”展开的,所以[B]不正确;根据第三、四句可知,使用风扇确实比不用风扇减少了婴儿猝死综合征的发生,但是第四句中的appeared表明这一方法的不确定性,而且末句的Researchershypothesized that再次印证了不确定性,所以[D]不正确.[C]中所述与末句的Researchershypothesized that不符。由上可知正确答案是[A]。
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