单调栈模板有共性，不必死记，按下面三步即可快速选型：
AccountType accountType = 4;，更多细节参见搜狗输入法下载
build-index renders all 1,418 source characters and 34 target characters as 48x48 greyscale PNGs, one per font that natively contains the character. Fontconfig is queried per-character to avoid brute-force rendering across all 230 fonts (97% reduction: 8,881 targeted renders vs 326,140 brute-force).，详情可参考搜狗输入法2026
对于 Protobuf 的介绍和原理，可以参考前文 juejin.cn/post/757536…