a point of contention的用法和样例：
- I make a point of giving a hand to others.
- The meeting is adjourned on a point of order.
- I always make a point of giving a hand to others.
- For example, when a table is known to be a point of contention, it can be beneficial to disallow page-level locks, thereby allowing only row-level locks.
- John made a point of thanking his hostess before his leaving.
- She make a point of send a birthday present to her best friend.