[Tutorial] Potentially confusing explanation of how a component rendering is triggered

I'm new to React and when learning, I first went through the tutorial and then went through the docs. In the tutorial I didn't quite understand why we absolutely have to use the setState() method. But when going through the Using State Correctly and then the API docs for setState() I understood why. Then I went back to the tutorial to see why I couldn't get this from the tutorial. State is introduced in the Making an Interactive Component section.

I think it'd be better if it's explicitly mentioned here that state changes are what causes components to be re-rendered and hence, one shouldn't attempt to modify state directly. The following part particularly is what gave the wrong impression I think. I took this to mean that it's events such as onClick that triggers a rendering.

By calling this.setState from an onClick handler in the Square’s render method, we tell React to re-render that Square whenever its <button> is clicked.

檢視教學中的「Making an Interactive Component」區段，以及連結的「Using State Correctly」和「setState() API」文件。著重於引用的說明，並確認修訂後的文字清楚區分點擊事件與狀態變更。當新手理解 setState() 為什麼會觸發渲染，以及為什麼不應直接修改狀態時，即表示完成。