selenium爬取问题

我想通过selenium爬取一个问答的内容，但是它没有重定向到新的页面，所以我要如何去操作它呢，比如我爬取的第一个问诊的对话，如何返回上一页继续爬取下一个会话,折磨我一天了求帮忙

from selenium import webdriver
from selenium.webdriver.common.by import By
import time, csv


class CYYS:

    def __init__(self, doc):
        self.doc = doc

    # 主函数
    def run(self):
        driver = webdriver.Chrome()
        driver.implicitly_wait(10)

        # 爬取网址
        driver.get("https://m.chunyuyisheng.com/qalist/?page=1&high_quality=0")
        driver.find_element(By.CSS_SELECTOR, ".hot-qa-list").click()
        time.sleep(1)
        self.handler(driver)
        # 返回会话页面，继续处理
        # driver.back()

# 对页面进行处理
    def handler(self, driver):
        driver.execute_script('window.scrollBy(0,10000)')
        driver.find_element(By.CSS_SELECTOR, ".showmore-btn").click()
        sessions = driver.find_elements(By.CSS_SELECTOR, ".block-right")
        for session in sessions:
            txt = session.find_elements(By.TAG_NAME, 'p')
            stringFilelds = [field.text for field in txt]
            print(stringFilelds)
            # self.Save(doc=self.doc, txt=stringFilelds)

    # def Save(self, doc, txt):
    #     with open(self.doc, 'w', encoding='utf-8') as f:
    #         f.write(str(txt) + '\n')


CYYS(doc='1.txt').run()

driver.switch_to.window(driver.window_handles[-1])定向到最新页面