React-Native-Maps |在圆内/半径内显示标记？

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

const MapScreen = () => {
  const center = { latitude: 37.78825, longitude: -122.4324 };
  const radius = 1000; // 半径，单位为米

  return (
    <View style={{ flex: 1 }}>
      <MapView
        style={{ flex: 1 }}
        initialRegion={{
          latitude: center.latitude,
          longitude: center.longitude,
          latitudeDelta: 0.0922,
          longitudeDelta: 0.0421,
        }}
      >
        <Circle
          center={center}
          radius={radius}
          fillColor="rgba(0, 0, 255, 0.2)"
          strokeColor="rgba(0, 0, 255, 0.5)"
        />
        <Marker
          coordinate={center}
          title="标记位置"
          description="这是一个在圆内的标记"
        />
      </MapView>
    </View>
  );
};

export default MapScreen;