请问各位大佬，我要创建一个虚拟环境，这哪里错了？

usage: venv [-h] [--system-site-packages] [--symlinks | --copies] [--clear] [--upgrade] [--without-pip] [--prompt PROMPT] [--upgrade-deps] ENV_DIR [ENV_DIR ...] Creates virtual Python environments in one or more target directories.
点后面又跟了D:这样是错误的格式。把点去掉试试。