您 resultInside 类并称不会在JSON存在一个额外的对象层。尝试将地图到您的数据类结果字段。

Your resultInside class is adding an extra object layer that does not exist in your JSON. Try moving the map to your Data class results field.

public class Data {
    @SerializedName("results")
    @Expose
    private Map<String, Vitals> result;

    //....
}