Performance (Update Delay) Fast (O(1) propagation) Slow (heap allocations and nested chaining) Fast (pruned update, lazy eval, diffing) Memory Usage Very low (stack + signals) High (many ...

补充光照：木槿本是喜光的植物，若长期在荫蔽环境下就会影响生长和开花，应让它多晒太阳。适量浇水：它虽耐旱，但土壤长期干旱缺水会影响开花，应尽快补水，保持土壤微湿。合理追肥：它长叶子消耗的养分多，若土壤贫瘠难以长叶，应勤施薄肥，施加 ...

**FILE** The District's Child Support Services Division Amnesty Program, announced by Attorney General Brian Schwalb, runs now through Sept. 19. (Robert R. Roberts/The Washington Informer) D.C.