void Geocoder::MatchCategories(BaseContext & ctx, bool aroundPivot)
{
TRACE(MatchCategories);

auto features = ctx.m_features[0];

if (aroundPivot) // the target country file was filtered by the rect, but the non-target was not be filtered, then emit all the result.
{
auto const pivotFeatures =
RetrieveGeometryFeatures(m_context, m_params.m_pivot, RectId::Pivot);
ViewportFilter filter(pivotFeatures, m_preRanker.Limit() / threshold */);
features.m_features = filter.Filter(features.m_features);
features.m_exactMatchingFeatures =
features.m_exactMatchingFeatures.Intersect(features.m_features);
}

// Features have been retrieved from the search index
// using the exact (non-fuzzy) matching and intersected
// with viewport, if needed. Every such feature is relevant.
features.ForEach([&](uint32_t featureId, bool exactMatch)---------------------send all features without flitering
{
Model::Type type;
if (!GetTypeInGeocoding(ctx, featureId, type))
return;

EmitResult(ctx, {m_context->GetId(), featureId}, type, TokenRange(0, ctx.NumTokens()),
           nullptr /* geoParts */, true /* allTokensUsed */, exactMatch);

});
}

This will cause a problem：when the target-country has not enough result in this rect, then will try to find other result
in other country files. but other country file not filter by rect.