您快到了，您只需要添加一个top_hits子聚合即可为每个存储桶检索一些文档：
POST /your_index/_search
{
"aggs" : {
"DateHistogram" : {
"date_histogram" : {
"field" : "timestamp",
"interval": "month"
},
"aggs": { <--- add this
"docs": {
"top_hits": {
"size": 10
}
}
}
}
},
"size" : 0
}
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