如何根据单选按钮设置React初始状态？

constructor(props) {
  super(props);
  this.state = {
    selectedOption: 'option1' // 设置初始状态为选项1
  };
}

render() {
  return (
    <div>
      <label>
        <input
          type="radio"
          value="option1"
          checked={this.state.selectedOption === 'option1'}
          onChange={this.handleOptionChange}
        />
        Option 1
      </label>
      <label>
        <input
          type="radio"
          value="option2"
          checked={this.state.selectedOption === 'option2'}
          onChange={this.handleOptionChange}
        />
        Option 2
      </label>
    </div>
  );
}

handleOptionChange = (event) => {
  this.setState({
    selectedOption: event.target.value
  });
}