[1] Providing Structured Data | Custom Search | Google Developers ( 版) <https://developers.google.com/custom-search/docs/structured_data?csw=1#using-pagemaps>
[2] Specify thumbnails - Custom Search Help ( 版) <https://support.google.com/customsearch/answer/1626955?hl=en>
[3] PageMaps - Custom Search Help ( 版) <https://support.google.com/customsearch/answer/1628213>