我用的百度AI识别图片，返回值如下：
{
"log_id": 1398984202156276557,
"direction": 0,
"words_result_num": 2,
"words_result": [
{
"words": "小明是小狗",
"probability": {
"variance": 0.0,
"average": 0.999742,
"min": 0.998732
}
},
{
"words": "丽丽大帅哥",
"probability": {
"variance": 0.000435,
"average": 0.987731,
"min": 0.946409
}
}
],
"language": -1
}

我不想要这么多内容，只需要WORDS的内容（小明是小狗 丽丽大帅哥），请教大神应该怎么写