The data variable is never used again after the object scope, but it is not necessarily cleared when we leave the block.

虽说变量在其作用域执行后不会再被使用了，但是这不意味着在我们离开作用域后他们就一定能被清理掉。

youdao

Once the trees were gone and the debris cleared, "the water went down and the streets were cleared block after block after block, " he said.

CNN: Ike damage prompts weeklong curfew in Houston