請用typescript中，實現javascript下面代碼同樣功能。let user = {name: 'alpha',sex: 'boy',age: 3}for(let i in user){console.log(i, user[i], user[i]['name'])}user['color'] = 'red'user['agefix'] = 5user['age'] += user['agefix']console.log(user)