原XML:
<?xml version="1.0" encoding="utf-8"?>
<China>
<Province name="北京市">
<City name="dcq">东城区</City>
<City name="syq">顺义区</City>
<City name="myx">密云县</City>
<City name="yqx">延庆县</City>
</Province>
<Province name="天津市">
<City name="hpq">和平区</City>
<City name="hdq">河东区</City>
<City name="hxq">河西区</City>
<City name="nkq">南开区</City>
</Province>
...........
<China>
问题是 怎样取得天津市(或者其他)节点下的子节点属性(name)值为"hxq"(或其他)的节点值?