You are looking at the HTML representation of the XML format.
HTML is good for debugging, but is unsuitable for application use.
Specify the format parameter to change the output format.
To see the non HTML representation of the XML format, set format=xml.
See the complete documentation, or API help for more information. 
<?xml version="1.0"?>
<api>
  <query-continue>
    <allfileusages gafcontinue="Badminton_Spielfeld_Einzel.png|103" />
  </query-continue>
  <query>
    <pages>
      <page pageid="82" ns="0" title="大隊接力" />
      <page pageid="103" ns="0" title="羽毛球" />
      <page pageid="502" ns="2" title="使用者:游士賢" />
      <page pageid="514" ns="0" title="二氧化矽" />
      <page pageid="1251" ns="0" title="埃及木乃伊棺槨" />
      <page pageid="1255" ns="0" title="蘇丹塔哈卡王陵墓出土之巫沙布提俑" />
      <page pageid="3266" ns="0" title="中國四大銀行" />
    </pages>
  </query>
</api>