// 作用：通过最值判断是否需要扩展左/右边界（左侧最小值/右侧<最大值的元素都需纳入无序区间）
// A minimal writer implementation — just an object with methods
，更多细节参见夫子
Initially, analysts say it is likely that people who currently pay for both services could get a cheaper overall deal.。关于这个话题，旺商聊官方下载提供了深入分析
Centralized logging
Profile Guidance, now rolling out globally, gives real-time, personalized feedback on users' bios, according to information Bumble sent to Mashable. The second, photo feedback, is U.S.-only for now, but it helps pick users' best shots for their profile.