2. As shown in Figure 1, construct squares $A B E F$ and $A C G H$ outside the acute triangle $\triangle A B C$, and draw the altitude $A D$ from $A$ to the base $B C$, intersecting $F H$ at $K$. The relationship between $B C$ and $A K$ is ().
(A) $B C>2 A K$
(B) $B C=2 A K$
(C) $B C<2 A K$
(D) Cannot be determined