The authors thank the department editor (J. George Shanthikumar), the associate editor, and the referees whose comments and guidance throughout the review process have greatly improved both the content and the exposition of the paper. The numerical experiments were done when the second author interned at the Alibaba DAMO Academy of Alibaba Group (US) Inc. under the supervision of Dr. Xinshang Wang and Prof. Wotao Yin. The authors gratefully acknowledge the support of Dr. Wang and Prof. Yin during the design of the experiments and the revision of the paper. Huanan Zhang thanks Yajie Wu for her help at the early stage of this manuscript.