2022-2023英语周报高一外研版第20期答案汇总

 Children who are raised in households with

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 Children who are raised in households with dogs or farm animals during their first year of life may have a lower risk of asthma（哮喘） a few years later, a new study suggests.

In the study, the researchers looked at early exposure to dogs and farm animals and the rate of asthma among about 377,000 preschool-age and 276,000 school-age children in Sweden. Among the school-age kids in the study, those who had been exposed to dogs during their first year of life were 13 percent less likely to have asthma at age 6.

The researchers said they don't know for sure what exactly may explain the link between early exposure to animals and a reduced risk of asthma. "It might be due to a single factor, or more likely, a combination of several factors related to a dog ownership lifestyle or dog-owners' attitudes, such as kids' exposure to household dirt and pet dust, time spent outdoors or being physically active," Fall told Live Science. "As a parent in a dog-and-baby-household, it is nearly impossible to keep everything clean, and maybe this is a good thing for your baby's future health." 

"My take-home message from this study is that parents at this point do not need to worry about keeping their dog when expecting a baby for fear of asthmatic disease," Fall said. "I do want to be clear that this recommendation is valid only for families without a child already having allergies（过敏）. If they already have a furred-animal-allergic child, we do not recommend them to get a furred pet."