范围 (fànwéi) refers to the range, scope, or extent of something, like the boundaries of an activity or topic. It is broader and more general than 规模 (guīmó, scale/scope of an operation) and 范畴 (fànchóu, a category or domain in philosophy/academia). 程度 (chéngdù) focuses on degree or level, not the boundary itself.