We cannot, and should not, expect users to know this.
There is nothing in the UI that emphasizes that these backups are now tightly coupled to their passkey. Even if there were explanatory text, Erika, like most users, doesn’t typically read through every dialog box, and they certainly can’t be expected to remember this technical detail a year from now.
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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.
，这一点在im钱包官方下载中也有详细论述
* @param low 起始索引
解放軍自實行軍銜制以來，首次出現陸軍上將全部被清零的局面。目前僅剩的4名上將中：張升民（火箭軍）、國防部長董軍（海軍）、韓勝延和楊志斌（均為空軍），沒有一位陸軍上將。，更多细节参见同城约会