Thanks in large part to the government's constant effort to improve urban planning, social security, and public service.
Thanks to本身是一个固定搭配，句中插入了in large part 副词短语。
固定搭配中间插入副词成分的使用方法，对于所有些固定搭配都适用吗？还是分状况？
还是分状况吧，有些可以，有些可能不可以。如： due partly to... =partly due to...但because of , 可以说mainly because of ... 但我没见过because mainly of ... 只能是见到就记住，没见过的要查字典或互联网资料。
