根据实际需要，修改班表，延长工时。
According to actual needs, and changes schedules, extend working hours.
一个通用的指导原则就是根据实际需要为查询引入恰如其分的复杂性。
A general guideline is to introduce only as much complexity in your queries as you really need.
你可以根据实际需要通过调整减少索引中的时间和资源消耗。
You can reduce the time and resources spent in indexing by tweaking this to your actual needs.
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