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好的，所以我想确定 MSA 1 中的一个值是否在字符串列表中。我有
HL7.{MSA:1} In ("AE", "AR", "CE", "CR")
这不起作用，那应该是什么？
想通了。它是
HL7.{MSA:1} In ("AE,AR,CE,CR")