一个更好的办法 [1.23[24.46] 但遮东还的具、 [1.819.16] [24.31[32.40] [55.57[58.601 [47:[48] 1531:[54] 50]:[51] 称四次！一个更好的办法 [1..23]:[24..46] [1..8]:[9..16] [47..54]:[55..62] [24..31]:[32..40] < = > ...... ...... [47..49]:[50..52] [63..65]:[66..68] [55..57]:[58..60] [47]:[48] [53]:[54] [50]:[51] ...... 称四次！