[星级问题]外键之XML->DataSet,如何读取?

Question

<?xml version="1.0" encoding="utf-8" ?>
<School>
<Teacher>
<Name>张老师</Name>
<Age>50</Age>
<Student>
<Name>王二</Name>
<Age>12</Age>
<Score>99</Score>
</Student>
<Student>
<Name>李三</Name>
<Age>13</Age>
<Score>100</Score>
</Student>
<Student>
<Name>赵大</Name>
<Age>11</Age>
<Score>89</Score>
</Student>
</Teacher>
<Teacher>
<Name>李老师</Name>
<Age>60</Age>
<Student>
<Name>龚齐</Name>
<Age>12</Age>
<Score>67</Score>
</Student>
<Student>
<Name>齐天</Name>
<Age>13</Age>
<Score>90</Score>
</Student>
</Teacher>
<Teacher>
<Name>王老师</Name>
<Age>40</Age>
<Student>
<Name>肖飞</Name>
<Age>12</Age>
<Score>89</Score>
</Student>
</Teacher>
</School>
这样的XML读入DataSet后有两个表: Student,Teacher. 如何取出"张老师"所带的学生"王二,李三,赵大"呢