这个方法接收多个参数，包括一条sql语句和一个结果处理程序，并返回一个泛型t的对象。

This method receives several parameters, including a SQL statement and a result handler, and returns an object of generic type t.

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接收并验证sql语句的语法。

Receive and verify the syntax of the SQL statement.

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要从一个进程内接收一条消息，可使用receive语句。

To receive a message from within a process, you use the receive statement.

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