在注释中提供了一些帮助之后，我实现了以下可行的解决方案

With some help provided in the comments, i realized the following working solution

findObject.ClearFormatting();
findObject.Text = @"\<*\>";
findObject.MatchWildcards=true;                     
findObject.Replacement.ClearFormatting();
findObject.Replacement.Text = "";                       

object replaceAll = Word.WdReplace.wdReplaceAll;
findObject.Execute(ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
    ref oMissing, ref oMissing, ref oMissing, ref oMissing, ref oMissing,
    ref replaceAll, ref oMissing, ref oMissing, ref oMissing, ref oMissing);

使用搜索模式\<*\>的

(包含通配符*，因此 findObject.MatchWildcards 必须设置为 true ).

which is using the search pattern \<*\> (containing the wildcard character *, hence findObject.MatchWildcards must be set to true).