Test analysis: The material in the title "Behind management efficiency is Temasek's high-quality governance model, that is, the company's special board composition, hierarchical progressive control model and effective restraint mechanism" emphasizes the positive significance of high-quality corporate governance model to improve enterprise management efficiency, and enlightens that the reform of state-owned enterprises in China must follow economic laws, carry out standardized corporate system reform, and improve enterprise operation efficiency. It can be seen that the two items meet the meaning of the question and can be selected; The expansion of investment field does not mean the enhancement of control, so item 1 is unscientific and cannot be selected; Under the condition of socialist market economy, the government implements macro-control over the economy and does not directly participate in the business activities of enterprises, so the third statement is wrong and cannot be chosen. So, the answer is D.