“导入错误：导入_openmp_helpers时DLL加载失败”？

我试图导入resample_img来自nilearn.image于使用重采样一些医疗图像。

import nibabel as nib
import nibabel.processing
from nilearn.image import resample_img

img = nib.load('./dicom_to_nifti.nii')
new_img = nibabel.processing.resample_to_output(img, (2, 2, 2))
new_img.to_filename('nifti_2_2_2')

但是，我不断收到此错误消息，提示它找不到sklearn模块？我已经通过安装了它pip install sklearn。我什至尝试卸载所有内容并进行全新安装，但弹出同样的问题。我确定这是我做错了什么，还是包装有问题。

Traceback (most recent call last):
  File "convert.py", line 9, in <module>
    from nilearn.image import resample_img
    _check_module_dependencies()
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\nilearn\version.py", line 111, in _check_module_dependencies
    _import_module_with_version_check(
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\nilearn\version.py", line 60, in _import_module_with_version_check
    module = __import__(module_name)
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\sklearn\__init__.py", line 75, in <module>
    from .utils._show_versions import show_versions
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\sklearn\utils\_show_versions.py", line 12, in <module>
    from ._openmp_helpers import _openmp_parallelism_enabled
ImportError: DLL load failed while importing _openmp_helpers: The specified module could not be found.. Module "sklearn" could not be found. See http://nilearn.github.io/introduction.html#installation for installation information.
PS C:\Users\craig\Documents\Files\westmead_radiomics> python test.py
Traceback (most recent call last):
  File "test.py", line 3, in <module>
    from nilearn.image import resample_img
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\nilearn\__init__.py", line 72, in <module>
    _check_module_dependencies()
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\nilearn\version.py", line 111, in _check_module_dependencies
    _import_module_with_version_check(
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\nilearn\version.py", line 60, in _import_module_with_version_check
    module = __import__(module_name)
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\sklearn\__init__.py", line 75, in <module>
    from .utils._show_versions import show_versions
  File "C:\Users\craig\AppData\Local\Programs\Python\Python38\lib\site-packages\sklearn\utils\_show_versions.py", line 12, in <module>
    from ._openmp_helpers import _openmp_parallelism_enabled
ImportError: DLL load failed while importing _openmp_helpers: The specified module could not be found.. Module "sklearn" could not be found. See http://nilearn.github.io/introduction.html#installation for installation information.

有任何想法吗？