Ruby -如何访问已解析的json中的键值？

json_data = '{"name": "John", "age": 30}'

require 'json'
data = JSON.parse(json_data)
puts data['name'] # 输出：John
puts data['age']  # 输出：30

json_data = '{"person": {"name": "John", "age": 30}}'

data = JSON.parse(json_data)
puts data['person']['name'] # 输出：John
puts data['person']['age']  # 输出：30

json_data = '{"people": [{"name": "John", "age": 30}, {"name": "Alice", "age": 25}]}'

data = JSON.parse(json_data)
data['people'].each do |person|
  puts person['name']
  puts person['age']
end