如何在React Native Maps中定位固定位置的标注？

import React from 'react';
import { View } from 'react-native';
import MapView, { Marker } from 'react-native-maps';

const App = () => {
  const initialRegion = {
    latitude: 37.78825,
    longitude: -122.4324,
    latitudeDelta: 0.0922,
    longitudeDelta: 0.0421,
  };

  return (
    <View style={{ flex: 1 }}>
      <MapView
        style={{ flex: 1 }}
        initialRegion={initialRegion}
      >
        {/* 在这里添加标注 */}
        <Marker
          coordinate={{ latitude: 37.78825, longitude: -122.4324 }}
          title="固定位置"
          description="这是一个固定位置的标注"
        />
      </MapView>
    </View>
  );
};

export default App;