Scrapy: output empty

问题

I am trying to use Scrapy to extract data from page. But I get an empty output. What is the problem?

spider:

class Ratemds(scrapy.Spider):
    name = 'ratemds'
    allowed_domains = ['ratemds.com']

    custom_settings = {
        'USER_AGENT': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36 OPR/60.0.3255.50747 OPRGX/60.0.3255.50747',
    }

    def start_requests(self): 
        yield scrapy.Request('https://www.ratemds.com/doctor-ratings/dr-aaron-morrow-md-greensboro-nc-us' , callback=self.profile)

    def profile(self, response):
 
        item =  {
                'url': response.request.url,
                'Image': response.css('.doctor-profile-image::attr(src)').get(),
                'First_and_Last_Name': response.css('h1::text').get()
            }
        yield item

output:

{'url': 'https://www.ratemds.com/doctor-ratings/dr-aaron-morrow-md-greensboro-nc-us', 'Image': None, 'First_and_Last_Name': None}

来源：https://stackoverflow.com/questions/62601706/scrapy-output-empty