* @param {string} num 非负整数的字符串形式（可能含前导零）
Most userland implementations of custom ReadableStream instances do not typically bother with all the ceremony required to correctly implement both default and BYOB read support in a single stream – and for good reason. It's difficult to get right and most of the time consuming code is typically going to fallback on the default read path. The example below shows what a "correct" implementation would need to do. It's big, complex, and error prone, and not a level of complexity that the typical developer really wants to have to deal with:，更多细节参见旺商聊官方下载
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The financial implications validate this direction. Google reported that AI features contributed to a 10% increase in search revenue, reaching $50.7 billion in Q1 2025. This isn't a failing experiment that might be discontinued. It's a successful product innovation that's generating substantial revenue while improving user experience. Google has every incentive to expand AI Mode and integrate its capabilities more deeply into standard search.