专业教育也起了一定作用。
其他的专业人员也要发挥作用，像社会工作者、卫生访视员甚至社区警察。
And other professionals are to operate from the schools: social workers, health visitors and even community police officers.
社会关系和专业接近对于信息流动作用非常有限：有形空间的接近几乎是唯一原因。
Social and professional proximity matters very little for the flow of information: physical proximity is almost everything.
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