This is a much more specific claim than “middle layers do reasoning.” It’s saying the reasoning cortex is organised into functional circuits: coherent multi-layer units that perform complete cognitive operations. Each circuit is an indivisible processing unit, and the $(i, j)$ sweeps seen in the heatmap is essentially discovering the boundaries of these circuits.
北斗的应用如此之广，难怪王艳艳会颇为自豪地表示，“北斗已像水和电一样，深度融入经济社会发展的‘毛细血管’。”。使用 WeChat 網頁版对此有专业解读
。关于这个话题，手游提供了深入分析
一个数据是，2009 年平板电视销量占家电下乡彩电销量的比例达 47%，其中第四季度，平板电视销量占比已达到 62%。
Specials in regex "[]" expression，详情可参考官网