int i = 0, j = 0, k = left; // i:左数组指针, j:右数组指针, k:原数组指针
/etc is also writable, but it’s managed a bit differently. OSTree uses a technique called “etc overlay” to handle modifications in /etc. When an update is applied, OSTree compares files in the new version with those in /etc and applies changes intelligently, preserving local modifications as much as possible.
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官方數據顯示，過去12個月基本必需品價格平均上漲60%，食物價格在同期翻倍。