There is no specific data on the number of divorces among the post-80s group, but the Chinese Research Association on Youth and Family says 30 percent of such marriages end up failing.
Although canonical examples use the vector representation as a key and value, there's no restriction on how you can define the value (such as an aggregate of a number of values).
虽然规范的示例使用矢量表达作为键和值，但是并没有限制您如何来定义值(例如一些值的汇总)。
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Leaving such a large number of people with no effective treatment would be an unthinkable tragedy.