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解析:
more teachers。本题的出题点在列举处(In relation to)。关于第二小点——education services,讲座中提到In relation to education services,with more children there’s a need for more schools and more teachers and so on.即:在教育服务方面,因为有了更多的孩子,所以需要更多的学校和教师,故答案为more teachers。