query efficiency的用法和樣例：
例句
- The problem of low query efficiency based on path expression was well solved with dual index strategy.
雙重索引策略很好地解決了基於路徑表達式查詢效率低的問題。 - The check on consistence of tree pattern queries can avoid unnecessary calculation, save query processing time, and improve query efficiency.
樹模式查詢的一致性判斷可以避免不必要的計算，節省查詢時間，從而提高查詢效率。
