[
  {
    "itemName": "letter_count",
    "roiFront": "480,133,55,34",
    "roiBack": "480,133,55,34",
    "mode": "DigitCounter",
    "method": "Default",
    "keyword": "",
    "description": "1/3"
  },
  {
    "itemName": "letter_question",
    "roiFront": "427,164,447,100",
    "roiBack": "427,164,447,100",
    "mode": "Single",
    "method": "Default",
    "keyword": "",
    "description": "问题"
  },
  {
    "itemName": "letter_answer_1",
    "roiFront": "424,261,450,74",
    "roiBack": "424,261,450,74",
    "mode": "Single",
    "method": "Default",
    "keyword": "",
    "description": "回答一"
  },
  {
    "itemName": "letter_answer_2",
    "roiFront": "428,350,438,74",
    "roiBack": "428,350,438,74",
    "mode": "Single",
    "method": "Default",
    "keyword": "",
    "description": "回答二"
  },
  {
    "itemName": "letter_answer_3",
    "roiFront": "428,439,443,72",
    "roiBack": "428,439,443,72",
    "mode": "Single",
    "method": "Default",
    "keyword": "",
    "description": "回答三"
  }
]