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问题: 句意问题

Older populations are a smart thing to be thinking about, as opposed to eternally going after the 15- through 19-year-olds。

这里going after ... through 怎么解释?

解答:

go after指的是追赶追逐

through作介词指的是(指时间)从头到尾经过,直到(某一时刻),the 15- through 19-year-olds具体指的是15至19岁(包括19岁在内)

联系到具体句子,考虑老年人群是一件明智的事情,而不是一味追求15至19岁年轻人的关注