怎么解决域名被劫持

import dns.resolver
import time

def check_dns(domain):
    try:
        answers = dns.resolver.resolve(domain, 'A')
        for rdata in answers:
            print(f"DNS record: {rdata}")
    except dns.resolver.NXDOMAIN:
        print("Domain does not exist.")
    except dns.resolver.NoAnswer:
        print("No answer from DNS server.")
    except dns.resolver.Timeout:
        print("DNS query timed out.")

def monitor_domain(domain, interval=3600):
    previous_records = set()
    while True:
        current_records = set(dns.resolver.resolve(domain, 'A'))
        if current_records != previous_records:
            print("DNS record changed!")
            check_dns(domain)
            previous_records = current_records
        time.sleep(interval)

if __name__ == "__main__":
    domain = "example.com"
    monitor_domain(domain)