index = 0
json.status 3
# st: 0 实践题 1 选择题
json.message do
  json.array! @challenge_answers do |answer|
    index += 1
    json.answer_id answer.id
    json.answer_name answer.name
    json.answer_score answer.score
    # 高层级不给答案
    if @power || @game.answer_open >= index
      json.answer_contents answer.contents
    end
  end
end



