最终，习近平同志坚持站在人民立场想问题，向上反映情况，争取政策支持。全县粮食征购任务减少了2800万斤，调整种植结构，“一减一加”让农民收入翻了番，生活真正有了起色。
// 栈不为空时才判断（避免访问stack.at(-1)时报错）
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That said, it's important to recognize that locking in itself is not bad. It does, in fact, serve an important purpose to ensure that applications properly and orderly consume or produce data. The key challenge is with the original manual implementation of it using APIs like getReader() and releaseLock(). With the arrival of automatic lock and reader management with async iterables, dealing with locks from the users point of view became a lot easier.
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