tweak

beta/src/pages/apis/usestate.md

@@ -856,4 +856,4 @@ button { margin-bottom: 10px; }
 
 Note that derived state must set be inside a condition like `prevCount !== count`, and there must be a call like `setPrevCount(count)` inside of it. Otherwise, your component would re-render in a loop until it crashes.
 
-If you can, try to avoid derived state. However, derived state is better than updating state in an effect. When you call the `set` function during render, React will render that component immediately after your component exits with a `return` statement. React will ignore the initial output so it won't need to render the children twice.
+If you can, try to avoid derived state. However, derived state is better than updating state in an effect. When you call the `set` function during render, React will re-render that component immediately after your component exits with a `return` statement, and before rendering the children. This way, children don't need to render twice.