1.快速统计行数（ctrl+Shift+(方向键向下)）。

bson数据类型

留个影响

public enum BsonType {    Double = 0x01,    String = 0x02,    Document = 0x03,    Array = 0x04,    Binary = 0x05,    Undefined = 0x06,    ObjectId = 0x07,    Boolean = 0x08,    DateTime = 0x09,    Null = 0x0a,    RegularExpression = 0x0b,    JavaScript = 0x0d,    Symbol = 0x0e,    JavaScriptWithScope = 0x0f,    Int32 = 0x10,    Timestamp = 0x11,    Int64 = 0x12,    MinKey = 0xff,    MaxKey = 0x7f}

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