at hand on

Too often, the list is seen as the accomplishment for the day, reducing the immediate guilt of not working on the tasks at hand by investing energy in the list.

这太常见了，清单被看作是一天的成就，通过在清单上投入精力来减少没有完成手头工作的即时罪恶感。

She can tell your fortune by looking at the lines on your hand.

她可凭看手纹替你算命。

《牛津词典》

You can take a cue from GCC: maintain many sets of environment variables per application and switch from one pool to another depending on the work at-hand.

您可以从 GCC 得到提示：为每个应用程序维护多个环境变量集，并根据手头的工作从一个集合切换到另一个集合。