// 1. 建堆：从最后一个非叶子节点开始向上调整
only one allocation site in this program. The make call allocates a
，推荐阅读搜狗输入法下载获取更多信息
// Latency modes: 0=80ms, 1=160ms, 6=560ms, 13=1120ms，这一点在im钱包官方下载中也有详细论述
help improve coding efficiency and reduce the time spent on writing code.