（三）未经许可，擅自经营按照国家规定需要由公安机关许可的行业的。
4.8 402. 移掉 K 位数字
。谷歌浏览器【最新下载地址】是该领域的重要参考
**MUST** avoid including redundant comments which are tautological or self-demonstating (e.g. cases where it is easily parsable what the code does at a glance or its function name giving sufficient information as to what the code does, so the comment does nothing other than waste user time)
These benchmarks measure throughput in controlled scenarios — real-world performance depends on your specific use case. The difference between Node.js and browser gains reflects the distinct optimization paths each environment takes for Web streams.