在微信公众号开发过程中，使用requests调用接口https://api.weixin.qq.com/cgi-bin/message/template/send?access_token=时，一直报错Connection to api.weixin.qq.com timed out，因为我使用的并发请求，请问官方这边是做了限制吗，因为我们用户量有点多， 所以每次发送超过上千时就会卡住，请求一直不返回就结果，希望官方能够回复一下，谢谢

socket.timeout: timed out
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urllib3.exceptions.ConnectTimeoutError: (<urllib3.connection.VerifiedHTTPSConnection object at 0x10eaaca20>, 'Connection to api.weixin.qq.com timed out. (connect timeout=20)')
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requests.exceptions.ConnectTimeout: HTTPSConnectionPool(host='api.weixin.qq.com', port=443): Max retries exceeded with url: /cgi-bin/message/template/send?access_token=32_B9TMIesNkf2cb1fA2XpxJloVt_XgycTEbsS3S2IVkb01L8smiRS3axvfbgHf2Wm-CAf6BaWJxbAUgujW0MIPDSqKU7OqtC3K5mCHjclP8SV9dnOgqJEq-E9fHe5flsjODzmJzq3vPeeqPEhVFQAaAAAALV (Caused by ConnectTimeoutError(<urllib3.connection.VerifiedHTTPSConnection object at 0x10eaaca20>, 'Connection to api.weixin.qq.com timed out. (connect timeout=20)'))