1.   <br />1、下载 习近平卫生大会致辞，放入文本中，采用三种方式切词。<br />2、读取习近平卫生大会致辞， 显示词语及出现次数（单个的字不参与统计）<br />3、读取习近平卫生大会致辞，显示词语及出现次数，由大到小排序输出 （单个的字不计算）

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