db.GPRS_PRODUCT_HIS_FEE.find({"条件字段" : "412171211145135"},{_id:0})

db.GPRS_PRODUCT_HIS_FEE.find({"条件字段" : "412171211145135"},{_id:0,"查询字段1":1,"查询字段1":1,"查询字段3":1,"查询字段4":1,"查询字段5":1,"查询字段6":1})

或者

db.GPRS_PRODUCT_HIS_FEE.find({"条件字段" : "412171211145135"},{"查询字段1":1,"查询字段2":1,"查询字段3":1,"查询字段4":1,"查询字段5":1,"查询字段6":1},{_id:0})