安装 Shapely: OSError: [WinError 126] 找不到指定的模块

I have to install Shapely package (http://toblerity.org/shapely/project.html#installation). But when I am using:

pip install Shapely

我收到此错误:

Collecting Shapely
  Using cached Shapely-1.5.17.tar.gz
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:UsersAppDataLocalTemppip-build-mwuxcainShapelysetup.py", line 38, in <module>
        from shapely._buildcfg import geos_version_string, geos_version, 
      File "C:UsersAppDataLocalTemppip-build-mwuxcainShapelyshapely\_buildcfg.py", line 200, in <module>
        lgeos = CDLL("geos.dll")
      File "C:UsersAnaconda3libctypes\__init__.py", line 344, in __init__
        self._handle = _dlopen(self._name, mode)
    OSError: [WinError 126] The specified module could not be found

    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in C:UsersAppDataLocalTemppip-build-mwuxcainShapely

而且，当我使用时:

conda install shapely

我收到此错误:

Fetching package metadata ...........


PackageNotFoundError: Package not found: Conda could not find '

我在 Windows 10(64 位)上使用 Python 3.6.0 (Anaconda3).

python -m pip install Shapely-1.5.17-cp36-cp36m-win_amd64.whl

pip install shapely==1.6b2