根据短文理解，完成下列各题。

    Helen and Linda are good friends. They are in the same class. They go to school five days a week. And they have seven classes a day. After school they play volleyball.

    The two girls' mothers are friends, too. They like sports. So they can play sports with the two girls on the weekend（在周末）. Linda's mother likes tennis and Helen's mother likes tennis, too. Can the two girls play tennis? Sure, they play it well.

    The four friends always play tennis in the morning, and watch TV in the afternoon. It's relaxing! The two girls like eating fruits. They like apples, strawberries and oranges. They think fruits are good and healthy. After playing tennis, their mothers always make (做) some fruit salad first. What good friends they are!

步骤1：称量4.66g草酸铁晶体进行处理后，配制成250 mL一定物质的量浓度的溶液。

步骤2：取所配溶液25.00 mL于锥形瓶中，加稀H₂SO₄酸化，滴加KMnO₄溶液至草酸根

恰好全部氧化成二氧化碳，同时MnO₄^-被还原成Mn^2＋。向反应后的溶液中加入一小匙锌粉，加热至溶液黄色刚好消失，过滤、洗涤，将过滤及洗涤所得溶液收集到锥形瓶中，此时溶液仍呈酸性。

步骤3：用0.0200 mol·L^-1KMnO₄溶液滴定步骤2所得溶液至终点，消耗KMnO₄溶液V₁ mL，滴定中MnO₄^-被还原成Mn^2＋。

重复步骤2、步骤3的操作2次，分别滴定消耗0.0200 mol·L^-1 KMnO₄溶液为V₂、V₃ mL。

记录数据如下表：

请回答下列问题：

历史文物可以帮助我们获取历史信息．如图所示为清政府颁赐的用于确定达赖、班禅继承人的“金奔巴瓶”，该文物可以见证清朝加强了对下列哪一地区的管辖（    ）