方法：运用密切值法进行统计分析。

Methods. Data was analyzed with osculating value method.

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将改进后的密切值法应用于湖泊富营养化评价中。

The modified osculating value method is applied in the lake eutrophication.

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将多指标转化为单一综合值，这是密切值法的最大功能。

The osculating value method can change the multi index to the single comprehensive value.

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将多指标转化为单一综合值，这是密切值法的最大功能。

The osculating value method can change the multi index to the single comprehensive value.

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