[
"KEY1":{"SUB_KEY1" : "VALUE1","SUB_KEY2" : "VALUE2"},
"KEY2":{"SUB_KEY1" : "VALUE1","SUB_KEY2" : "VALUE2"}
]
[
"KEY1":{"SUB_KEY1" : "VALUE1","SUB_KEY2" : "
阅读背景：
从ruby中的json获取特定的键值
来源：互联网
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