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While preschool programs are common in the United States and other developed countries, Simpson says they’re rare in African nations. 辛普森说，尽管学前教育在美国及其他发达国家很普遍，但对于非洲国家来说，还是很少见的。 “Often young children between zero and 3 years old, the health systems are keeping track of them and they’re doing vaccinations and things like that.  And then, when they turn about 5 or 6, they enter into the school systems and the ministries of education take them over. But these in-between years, they’re not being cared for by the health ministries and they’re not yet being looked after by the education ministries in many cases,” she says young students... positively from the beginning.