我正在用 golang 編寫一個函數來搜索已編入索引的 elasticsearch 文檔中的字符串。我正在使用 elasticsearch golang 客戶端elastic。例如考慮對象是推文，type Tweet struct {    User    string    Message string    Retweets int}搜索功能是func SearchProject() error{    // Search with a term query    termQuery := elastic.NewTermQuery("user", "olivere")    searchResult, err := client.Search().        Index("twitter").   // search in index "twitter"        Query(&termQuery).  // specify the query        Sort("user", true). // sort by "user" field, ascending        From(0).Size(10).   // take documents 0-9        Pretty(true).       // pretty print request and response JSON        Do()                // execute    if err != nil {        // Handle error        panic(err)        return err    }    // searchResult is of type SearchResult and returns hits, suggestions,    // and all kinds of other information from Elasticsearch.    fmt.Printf("Query took %d milliseconds\n", searchResult.TookInMillis)    // Each is a convenience function that iterates over hits in a search result.    // It makes sure you don't need to check for nil values in the response.    // However, it ignores errors in serialization. If you want full control    // over iterating the hits, see below.    var ttyp Tweet    for _, item := range searchResult.Each(reflect.TypeOf(ttyp)) {        t := item.(Tweet)        fmt.Printf("Tweet by %s: %s\n", t.User, t.Message)    }此搜索正在打印用戶“olivere”的推文。但是如果我給出“橄欖”，那么搜索就不起作用了。如何搜索屬于用戶/消息/轉推的字符串？有人可以幫我解決這個問題嗎？謝謝