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 是你要做的请求： 
 
/v3/surveys?api_key=<key>&fields=per_page
 
 并期望返回的字段只是per_page（没有数据，或其他任何东西）？ 
 
 我认为这不起作用，我认为fields url参数仅适用于特定资源，而不适用于资源列表。 
 
 因此，如果您想过滤掉特定的调查，这将有效： 
 
/v3/surveys/<survey_id>?api_key=<key>&fields=title
 
 但不是资源列表，它总是返回可用项目的总数，您当前所在的页面，每页有多少项目，分页链接以及data下的所有资源项目。 
 
 编辑：解释如何获得调查回复 
 
 获取调查回复的文档在这里 。 根据您的评论，您想要做的是： 
 
GET /v3/surveys/<id>/responses?api_key=<key>&email=<email>&start_created_at=<begin_range>&end_created_at=<end_range>
 
 这将通过提供的电子邮件以及由和指定的日期范围内的所有响应（通过ID）获取。 
 
 然后，您可以在此处获取该响应的所有详细信息（每个页面的每个答案）： 
 
GET /v3/surveys/<id>/responses/<response_id>?api_key=<key>
 
 鉴于您正在使用电子邮件收集器（这就是您收到电子邮件的方式），并且在该调查的列表中确实应该只返回一个响应ID，除非他们不止一次地回答了调查。 如果是这样的话你就可以做到 
 
GET /v3/surveys/<id>/responses/bulk?api_key=<key>&email=<email>&start_created_at=<begin_range>&end_created_at=<end_range>
 
 只有一个请求，您可以在一个请求中获得所有响应，包括给定电子邮件的答案。 

Is the request you're trying to do:
 
/v3/surveys?api_key=<key>&fields=per_page
 
And expecting the fields returned to only be per_page (no data, or anything else)?
 
I don't think that'll work, I think the fields url parameter only works for a specific resource, not a resource list.
 
So if you wanted to filter out a specific survey, this would work:
 
/v3/surveys/<survey_id>?api_key=<key>&fields=title
 
But not for a resource list, it'll always return the total amount of items available, which page you're currently on, how many items per page, the links for pagination, and all the resource items under data.
 
EDIT: Explaining how to get survey responses
 
The docs for fetching survey responses are here. What you'd want to do based on your comment is:
 
GET /v3/surveys/<id>/responses?api_key=<key>&email=<email>&start_created_at=<begin_range>&end_created_at=<end_range>
 
This will get you all the responses (by ID) for a respondent with the provided email, and within the date range specified by and .
 
You can then fetch all the details of that response (every answer for every page) here:
 
GET /v3/surveys/<id>/responses/<response_id>?api_key=<key>
 
Given that you are using an email collector (that's how you have their email) and there should really only be one response ID returned in the list for that survey, unless they answered the survey more than once. If that's the case then you can do 
 
GET /v3/surveys/<id>/responses/bulk?api_key=<key>&email=<email>&start_created_at=<begin_range>&end_created_at=<end_range>
 
Only, which with one request you can get all the responses including the answers for that given email in one request.