目的观察在肝癌根治术中植入5-氟尿嘧啶（5-Fu）缓释剂对原发性肝癌早期复发的影响。方法将100例原发性肝癌行肝癌根治术患者随机分为......

Optimal planting density and proper fertilization method are important factors to improve maize yield and nutrient utili......