<ClinicalDocument>
<entry>
<substaceAdministration>
<effectiveTime></effectiveTime>
</substaceAdministration>
</entry>
<entry>
<substaceAdministration>
<effectiveTime></effectiveTime>
</substaceAdministration>
</entry>
<entry>
<substaceAdministration>
</substaceAdministration>
</entry>
</ClinicalDocument>
<ClinicalDocument>
<entry>
<substaceAdmi
阅读背景：
如何为每个孩子断言一个元素是否存在
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