string str = File.ReadAllText(@"F:txt.txt", Encoding.GetEncoding("gb2312"));//换成你的字符串
            Regex reg = new Regex(@"(?is)(?<=)s*

]*?>((?:(?!?h1).)*)

]*?>((?:(?!?p).)*).*?splitAuthor(['""]([^'""]+)['""])");
            Match m = reg.Match(str);
            Console.WriteLine(m.Groups教程[1].Value);
            Console.WriteLine(m.Groups[2].Value);
            Console.WriteLine(m.Groups[3].Value);
            Console.ReadLine();
/*
“贾志刚《说春秋》之二：秦晋恩怨”

“齐楚争雄，桓公野心高涨，楚王枕戈待旦，南北战争，箭在弦上，一触即发……晋室血雨腥风，勾心斗角，摇摇欲坠；大秦崛起边陲，倾慕中原，与晋联姻，道不清恩恩怨怨……公子重耳十九载颠沛流离，幸得非凡团队忠心不贰，走南闯北，忍辱负重，终至王者归来……”

贾志刚

*/