no-brainer
noun /ˌnəʊ ˈbreɪnə(r)/
/ˌnəʊ ˈbreɪnər/
(informal)- a decision or a problem that you do not need to think about much because it is obvious what you should do
无需用脑的事；容易的决定 - The question of who to support in this election should be a no-brainer.
在这次选举中支持谁的问题应该是显而易见的。 - I said yes straight away. It was a no-brainer for me.
我马上答应了。对我来说，这是显而易见的。
- The question of who to support in this election should be a no-brainer.