<?xml version="1.0" encoding="utf-8"?>
<Patients>
<Patients_virtue ID = "001">
<Last_Name>jay </Last_Name>
<First_Name>hoho </First_Name>
<MI>0091 </MI>
<Creation_Date>20091220 </Creation_Date>
<Patient_ID>100 </Patient_ID>
</Patients_virtue>
<Patients_virtue ID = "002">
<Last_Name>LiLi </Last_Name>
<First_Name>ccc </First_Name>
<MI>1015 </MI>
<Creation_Date>20091221 </Creation_Date>
<Patient_ID>101 </Patient_ID>
</Patients_virtue>
<Patients_virtue ID = "003">
<Last_Name>suzuki </Last_Name>
<First_Name>tanaka </First_Name>
<MI>1231 </MI>
<Creation_Date>20091222 </Creation_Date>
<Patient_ID>110 </Patient_ID>
</Patients_virtue>
</Patients>
上面的xml文件中有 3个病人的信息 我想通过调用一个函数依次取出每个病人的信息 ，每�
