第五条 纳税人开具增值税专用发票，应当分别列明销售额和增值税税额。
// 逻辑：只要左侧元素最小值，说明该元素需纳入无序区间，左边界左移
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Hospitals are being told to prioritise emergency patients ahead of those on the waiting list.，详情可参考safew官方版本下载
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