We really can't control it, or other circumstances where equipment deliberately interferes with pages loading properly. For performance issues, a number of things are served from a content delivery network and China sporadically blocks access to these.
To my knowledge, this has never broken anyone's ability to read a question and answer that turned up in a search - which is good; folks facing this can still find answers to their questions.
However, when stuff deliberately keeps certain things from loading, we can't possibly guarantee the experience that someone would have, and we can't really optimize for selectively switching to / from content delivery networks based on a vague idea of hosts that might have difficulty reaching the CDNs.
A solution could be implemented client-side, but that would require mirroring everything on our CDN as well as Google's on a host that's known to be available there then testing for those elements and loading from a fallback if they're not found - but what happens if that mirror suddenly falls out of favor with the GFOC?
As much as I hate it, we can't optimize for situations similar to folks deliberately pulling the ethernet cable out of their computers at various stages of a page trying to load (which is, effectively, what it looks like from a software perspective).