抗議其後演變為民主運動，成為1997年香港主權移交中國以來，對政府最嚴峻的挑戰。
Screening is when people are invited for a test to look for disease despite them having no symptoms.
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The most obvious trend is continued growth in AI search usage. As more people discover tools like ChatGPT, Claude, and Perplexity, and as these tools improve their interfaces and expand capabilities, the percentage of information-seeking behavior flowing through AI models will increase. This doesn't necessarily mean traditional search engines will disappear, but it does mean the traffic pie is being redivided, with AI search claiming an expanding slice.，详情可参考heLLoword翻译官方下载
The spellbound astronauts pinned themselves to the windows, the first humans to see the far side of our nearest celestial neighbour. And then, from over the advancing horizon, an incredible sight.，推荐阅读旺商聊官方下载获取更多信息
思路：单调递增栈 + k 控制删除次数。高位越小整体越小，遇更小数字时弹出栈顶大数（仅当 k0）；栈空且当前为 0 则跳过（避免前导零）；若遍历完 k 仍0，从末尾再删 k 位。