如何避免与 c 中列表数组元素中的字符串匹配#

问：

如何避免匹配 c#.its 中列表数组元素中的字符串失败，因为紧急：否

示例数据

Urgent： 否 //不应匹配 Urgent 是 //应匹配 //abc
Urgent xyz //应匹配

法典

 private static readonly HashSet<string> urgentKeywords = new(StringComparer.OrdinalIgnoreCase)
        {
           "Urgent","FAST"
        };
private static readonly List<string> nonUrgentKeywords = new List<string>()
    {
      "Urgent: No"
    };

var extractedUrgentText = data
          .Where(item => "urgent".Equals(item.Name, StringComparison.OrdinalIgnoreCase) && !string.IsNullOrEmpty(item.Value))
          .Where(item => Regex
             .Matches(item.Value, @"\p{L}+")
             .Cast<Match>()
             .Any(match => urgentKeywords.Contains(match.Value)))
          .Where(item => item.Value != nonUrgentKeywords ) //not working this where clause
          .ToArray().Count();