tasks := make([]task, 0, lengthGuess)
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.
，这一点在51吃瓜中也有详细论述
fills up, so we can eventually append most new tasks to the slice
圖像來源，Getty Images