This decision seems to be one of the more hotly-contested among ergo enthusiasts. A conventional keyboard has staggered keys, with each row slightly offset to the rows above and below it — so the A key is about halfway between the Q and W above it. This is a holdover from vintage mechanical typewriters, in which each press activated a hammer that smashed ink onto paper in the shape of a letter. To fit the hammers as close together as possible, while still allowing for finger pads, the keys were staggered.
Point lookups are useful, but the operation you'll reach for more often is a range query: give the tree a rectangular region and retrieve every point inside it, without scanning the entire dataset.
，这一点在91视频中也有详细论述
Proposals to ban the importation of second hand petrol and diesel cars from 2030 have been scrapped by the Environment Minister.
第三十七条 电信服务提供者应当采取下列措施，防范其服务被用于实施违法犯罪活动：