Discussion of 空间/空間 [kōng jiān] space, room - Trainchinese

1 - This in business also means profit margin 2 - How is 空间 (kōngjiān) used in everyday conversation? 3 - Are there any other words that mean something similar to 空间 (kōngjiān)? 4 - When should I use 空间 (kōngjiān) instead of another word?

1 - 在商业领域，这亦指利润率。2 - 空间（kōngjiān）在日常对话中的运用方式为何？3 - 是否存在其他与空间（kōngjiān）含义相近的词汇？4 - 在何种情况下应使用空间（kōngjiān）而非其他词汇？