id,node_id,number,title,user,state,locked,assignee,milestone,comments,created_at,updated_at,closed_at,author_association,active_lock_reason,draft,pull_request,body,reactions,performed_via_github_app,state_reason,repo,type
1612927729,I_kwDOAMm_X85gI1Lx,7592,nan,117328108,closed,0,,,1,2023-03-07T08:03:17Z,2023-03-07T21:35:43Z,2023-03-07T21:35:41Z,NONE,,,,"### What is your issue?

ps_point = d1.sel(lon='117.17638888845157', lat='35.47979166666699')
print(ps_point.values)

When I run the above code, the terminal shows 'nan'. How to solve it?
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