现在你走进校园，会发现到处是草坪、花坛、灌木丛林，树成林草连片，过去裸露的地面不见了。
O O B-Person O O B-Location I-Location O O O O O O O B-Location I-Location O B-Location I-Location O B-Location I-Location I-Location I-Location O B-Thing O B-Thing I-Thing O O O B-Time I-Time O O O B-Location B-Thing O O O O