单独顺序 \tnote

Question

如果我有两个连续的\tnote{}标签，它们会变形为一个数字，在下面的 MVE 中，我得到的不是 1 和 2，而是 12，有没有办法从视觉上区分这两个注释？

\documentclass{article}

\usepackage{threeparttable}
\usepackage{booktabs}
\usepackage{dcolumn}
\usepackage{longtable}
\usepackage{threeparttablex}

\begin{document}

\begin{ThreePartTable}
  \begin{TableNotes}  %%% This should come before longtable and it is not tablenotes but TableNotes
  \small
  \item[1] first note
  \item[2] second note 
  \end{TableNotes}
\begin{longtable}{rr}
  \caption{My caption}\label{mytbl}\\
  \toprule
  City & Country \\
  \midrule
  \endhead

\midrule
\endfoot
\bottomrule
\insertTableNotes         %% this added
\endlastfoot

  London & UK \tnote{1} \tnote{2} \\

  %\bottomrule
  \end{longtable}
  \end{ThreePartTable}

  \end{document}