第一百三十七条 公安机关应当履行同步录音录像运行安全管理职责，完善技术措施，定期维护设施设备，保障录音录像设备运行连续、稳定、安全。
This is the same idea behind binary search. In a sorted array, you compare against the middle element and eliminate half the remaining candidates. In a quadtree, you choose one of four quadrants and ignore the other three regions. Each level narrows the search space by a factor of four instead of two.，推荐阅读WPS官方版本下载获取更多信息
from typing import List, Tuple, Dict, Any, Optional。服务器推荐对此有专业解读
What are Moon phases?According to NASA, the Moon takes about 29.5 days to orbit the Earth. Over the course of this period, it moves through eight recognisable phases, what we call the lunar cycle. While the same side of the Moon always faces us, the amount of its surface lit by the Sun changes as it continues along its path. The shifts in sunlight create the different appearances we see from Earth, ranging from a fully illuminated Moon to a thin sliver or near darkness. The eight phases are: