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你好，想问一下，为什么用exchange.IO("api", "GET", "/api/v5/market/history-candles", "instId=BTC-USDT&before=1639467042705&after=1639467642705");查不出数据，而使用HttpQuery("https://www.okex.com/api/v5/market/history-candles?instId=BTC-USDT&before=1639467042705&after=1639467642705")却可以查出数据 
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