这是最隐蔽的坑！因为多个虚拟线程会共享同一个载体线程，而 ThreadLocal 的数据是绑定到线程本身的（即载体线程）。如果在虚拟线程里用 ThreadLocal 存数据（比如当前登录用户），可能出现 A 虚拟线程存的数据被 B 虚拟线程读走的情况。
Business live – latest updates
，这一点在heLLoword翻译官方下载中也有详细论述
indiandefencereview.com
3. Apply per-script thresholds. Cyrillic confusables at 0.447 mean SSIM require aggressive blocking. Mathematical Alphanumeric Symbols at 0.302 can be handled more permissively, especially since NFKC already collapses most of them. Arabic at 0.205 generates almost no genuine visual confusion and can be deprioritised entirely.