string input = "大病医疗(个人)";
input = Regex.Replace(input, @"[|]|.|(|)", @"$0");
searchText = Regex.Replace(searchText, @"[|]|.|(|)", @"$0");
Regex reg = new Regex(@"(?<![u4e00-u9fa5])" + searchText + @"(?![u4e00-u9fa5])");
return reg.Replace(input, repalceText);
Regex reg = new Regex(@"(?<![u4e00-u9fa5])" + searchText + @"(?![u4e00-u9fa5])");
return reg.Replace(input, repalceText);