TeX can recurse via macro expansion, but there is no call stack, no local variables, and deep recursion risks hitting engine limits. So the search uses three explicit loop levels, one for each depth:
马斯克转发《猩球崛起》视频嘲讽
，详情可参考新收录的资料
Publicly, US officials have projected confidence that they know where the uranium is stored. Privately, there is said to be less certainty. In the weeks before the latest US and Israeli strikes, monitors from the Vienna-based International Atomic Energy Agency observed sustained activity outside tunnels built into a hillside near Isfahan, where the material was last documented before the fighting began.
Мощный удар Израиля по Ирану попал на видео09:41
Кадры ударов США по целям в Иране показалиCENTCOM опубликовало кадры ударов США по целям в Иране