It's likely some combination of all three. The timing of the steepest declines (second half of 2025) coincides with AI Overviews expanding to more query types and AI assistants reaching broader adoption.
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（二）移动、损毁国家边境的界碑、界桩以及其他边境标志、边境设施或者领土、领海基点标志设施的；，这一点在体育直播中也有详细论述