方法：用流率基本入树建模法构建系统流图，用VENSIM软件进行模拟分析和干预。

Methods: Using the SD model to build the SD diagram and using VENSIM to do stimulation analysis and intervention.

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流率基本入树建模法不仅实现了规范化建模，而且有利于反馈环的计算和反馈性分析清晰化。

SD rate variable fundamental in-tree modeling not only realizes standardization of modeling but also is beneficial to calculation of feedback loops and perspicuity of feedback analysis.

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物业管理处发现漏水后，欲入树山室内关上水龙头，但是却发现树山公寓门上多加了两道锁。

The superintendent detected the leak, and tried to get into Shu's unit to turn off the water tap, only to find that there were two extra locks on the unit door.

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