请教个问题。pygmt已经安装好，但是import之后出现以下错误，请教下应该怎么解决

raise GMTCLibNotFoundError("\n".join(error_msg))
pygmt.exceptions.GMTCLibNotFoundError: Error loading GMT shared library at 'gmt.dll'.
Could not find module 'gmt.dll' (or one of its dependencies). Try using the full path with constructor syntax.
Error loading GMT shared library at 'gmt_w64.dll'.
Could not find module 'gmt_w64.dll' (or one of its dependencies). Try using the full path with constructor syntax.
Error loading GMT shared library at 'gmt_w32.dll'.
Could not find module 'gmt_w32.dll' (or one of its dependencies). Try using the full path with constructor syntax.

试试添加gmt的环境变量，例如：
GMT_LIBRARY_PATH-> C:\programs\gmt6\bin
参考：
https://github.com/GenericMappingTools/pygmt/issues/1470