问如何快速选择Django中的纬度和经度范围？

EN

class Place(models.Model):
    user = models.ManyToManyField(settings.AUTH_USER_MODEL, related_name='places_user')
    title = models.CharField(max_length=250)
    address = models.CharField(max_length=500)
    latitude = models.FloatField()
    longitude = models.FloatField()
    image = models.ImageField(upload_to='place-images')

    def __unicode__(self):
        return self.title