  Using a general parameterization of two-body scattering amplitude, we
systematically analyze the corresponding data on $X(3872)$, more explicitly,
the CDF data on inclusive $p\bar{p}$ scattering to $J/\psi \pi^+\pi^-$, and the
Belle and BaBar data on $B$ decays to $K\, J/\psi \pi^+\pi^-$ and $K
D\bar{D}^{*0}$ around the $D^0\bar{D}^{*0}$ threshold. We achieve a good
reproduction of data and find that the $X(3872)$ can be interpreted as a bound
and/or virtual state, or even higher-order (double or triple) virtual sate
pole. The latter point was not realized previously in the literature. % The
latter point has not been realized in other literatures. As a result, the
compositeness of the $X(3872)$ can vary largely from nearly 0 to 1. More
higher-precision data is needed to discriminate its pole structure and nature.
