请问一下 怎么对付正统防御
[Site "Chess.com iPhone"]
[Date "2023.03.27"]
[Round "?"]
[White "白"]
[Black "黑"]
[Result "*"]
[FEN "rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1"]
1.d4 Nf6 2.Nf3 d5 3.e3 e6 4.Bd3 Be7 5.Nbd2 O-O 6.c3 c5 7.dxc5 Qc7 8.O-O Nbd7 9.b4 b6 10.cxb6 Nxb6 11.Bb2 e5 12.e4 Be6 13.Re1 Nc4 14.Nxc4 dxc4 15.Bc2 a5 {*}
d4 d5 c4 e6