血栓的症状是什么

{"name":"\u8840\u6813\u7684\u75c7\u72b6\u662f\u4ec0\u4e48","type":"\u65e5\u672c\u52a8\u6f2b","area":"\u53f0\u6e7e","year":"2005","lang":"\u97e9\u8bed","play":"\u9ad8\u6e05","type1":"\u65e5\u672c\u52a8\u6f2b"}