a pointed stick的用法和样例：
- That is a pointed stick.
- Our part-Indian guide had cleared the path to the lake the day before; when we walked the path we saw where he had impaled the lopped head of a boa, open-mouthed, on a pointed stick by the canoes, for decoration.
- A stake or pointed stick;a picket.
- The stick tapers off to a point.
- The stick tapered off to a point.