您有一个地址清理服务，它检查地址的有效性，但是需要给出一个地址作为被逗号分隔的值；也就是说，库中存在一种 AddressCSV 数据类型。

You have an address cleansing service that checks the validity of addresses, but requires an address to be given as a comma delimited value; that is, there is an AddressCSV data type in the library.

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