[Enhancement] Refactor Q&A

[xvjiarui]

No description provided.

[codecov]

Codecov Report

Merging #4045 into master will increase coverage by 0.02%.
The diff coverage is 37.50%.

@@            Coverage Diff             @@
##           master    #4045      +/-   ##
==========================================
+ Coverage   61.91%   61.94%   +0.02%     
==========================================
  Files         224      224              
  Lines       16634    16619      -15     
  Branches     2811     2809       -2     
==========================================
- Hits        10299    10294       -5     
+ Misses       5836     5826      -10     
  Partials      499      499              

Flag	Coverage Δ
unittests	61.94% <37.50%> (+0.02%)	⬆️

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Impacted Files	Coverage Δ
mmdet/core/anchor/anchor_generator.py	78.98% <ø> (ø)
mmdet/models/dense_heads/atss_head.py	27.94% <ø> (-0.02%)	⬇️
mmdet/models/dense_heads/gfl_head.py	27.35% <ø> (-0.04%)	⬇️
mmdet/models/dense_heads/vfnet_head.py	31.48% <ø> (+0.07%)	⬆️
mmdet/core/utils/dist_utils.py	25.64% <16.66%> (-1.64%)	⬇️
mmdet/core/utils/__init__.py	100.00% <100.00%> (ø)

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