3. 递归：对左右子数组递归执行1-2步
Trump 'very disappointed' with UK's Starmer for blocking use of air bases, Telegraph says
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If the talks fail, there is uncertainty over what the US may do regarding a possible military attack against Iran, and when it might act. Questions remain over what this could mean for the wider region, with Iran warning it would retaliate and even attack Israel.
from urllib.parse import urljoin, urlparse