/// <summary>
/// 取最新一条
/// </summary>
/// <param name="keywords"></param>
/// <returns></returns>
private async Task <LnPage <News> > SearchIndex_Test(string keywords)
{
return(await client
.SearchIndex(keywords)
.MatchField(item => item.Title, "red")
.MatchField(item => item.Content, Color.Red, 100)
.OrderByDescending(item => item.OrderIndex)
.Skip(0)
.Take(1)
.ToPage());
}