if (tree.tag === "Empty") return accumulator;
This morning, three vessels were struck attempting to transit the Strait of Hormuz. The Strait is effectively closed. Since the beginning of the conflict involving the United States, Israel and Iran on Feb. 28, 2026, oil tanker traffic through the world’s most critical oil shipping choke point has collapsed, dropping by more than 90%.
，这一点在新收录的资料中也有详细论述
// if count { ... } // compile error — count is int, not bool，详情可参考新收录的资料
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