The solution is "not one single thing - it's a whole mix.

解决办法“并不是单一性的，而是综合性的。

youdao

youdao

There was not a single thing about her that one could find fault with.

在她身上找不出一点让人家说长道短的地方。

《新英汉大辞典》

So, again, there's not one -- as I said yesterday, there's not one single thing that any piece of legislation can do, because we faced problems on any number of significant fronts.

WHITEHOUSE: Press Briefing

Forty spacecraft have been sent there, and not one has found a single fossil or living thing.

NEWYORKER: The Martian Chroniclers

Even though polls showed that two-thirds of Americans of all political stripes supported the ideas in this bill, not one single Republican stepped up to say, this is the right thing to do.

WHITEHOUSE: President Obama on the American Jobs Act in Scranton, Pennsylvania | The White House