全文获取类型
收费全文 | 89994篇 |
免费 | 8287篇 |
国内免费 | 6506篇 |
专业分类
耳鼻咽喉 | 844篇 |
儿科学 | 790篇 |
妇产科学 | 898篇 |
基础医学 | 10409篇 |
口腔科学 | 1671篇 |
临床医学 | 12298篇 |
内科学 | 12898篇 |
皮肤病学 | 909篇 |
神经病学 | 4258篇 |
特种医学 | 2909篇 |
外国民族医学 | 57篇 |
外科学 | 8748篇 |
综合类 | 15920篇 |
现状与发展 | 22篇 |
一般理论 | 14篇 |
预防医学 | 6289篇 |
眼科学 | 2822篇 |
药学 | 9818篇 |
90篇 | |
中国医学 | 5310篇 |
肿瘤学 | 7813篇 |
出版年
2024年 | 344篇 |
2023年 | 1469篇 |
2022年 | 3759篇 |
2021年 | 4818篇 |
2020年 | 3606篇 |
2019年 | 3058篇 |
2018年 | 3114篇 |
2017年 | 2914篇 |
2016年 | 2622篇 |
2015年 | 4299篇 |
2014年 | 5146篇 |
2013年 | 4397篇 |
2012年 | 6465篇 |
2011年 | 7144篇 |
2010年 | 4722篇 |
2009年 | 3787篇 |
2008年 | 4683篇 |
2007年 | 4655篇 |
2006年 | 4695篇 |
2005年 | 4801篇 |
2004年 | 3209篇 |
2003年 | 2913篇 |
2002年 | 2461篇 |
2001年 | 2109篇 |
2000年 | 1965篇 |
1999年 | 2102篇 |
1998年 | 1435篇 |
1997年 | 1350篇 |
1996年 | 1014篇 |
1995年 | 1018篇 |
1994年 | 850篇 |
1993年 | 535篇 |
1992年 | 593篇 |
1991年 | 538篇 |
1990年 | 473篇 |
1989年 | 384篇 |
1988年 | 348篇 |
1987年 | 302篇 |
1986年 | 230篇 |
1985年 | 179篇 |
1984年 | 94篇 |
1983年 | 61篇 |
1982年 | 32篇 |
1981年 | 45篇 |
1980年 | 17篇 |
1979年 | 30篇 |
1977年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
11.
百年乐与人参黄芪合剂对心血管系统的药理作用比较 总被引:1,自引:1,他引:0
百年乐和人参黄芪合剂对心血管系统的作用研究表明:百年乐能加速小鼠肠系膜微循环障碍的恢复,增加离体兔耳血管的流量,使主动脉平滑肌松弛,对抗心肌缺氧,抑制血栓形成,其作用强于人参黄芪合剂。 相似文献
12.
中国女性的生殖健康权力 总被引:1,自引:1,他引:0
郑晓瑛 《中国计划生育学杂志》1996,4(2):117-119
<正> 中国的计划生育工作和人口控制的进程取得了举世瞩目的成就,中国妇女在这方面做出了巨大的贡献。在目前的生育调节工作中,妇女承担了几乎全部的生育调节和养育子女的责任及义务。社会、家庭甚至妇女本身都默认和接受了这种程式化的规范。 相似文献
13.
14.
本文从12379枚离体牙上观测了釉珠的发生率、发生部位、形态、直径大小。结果釉珠的发生率为2.49%,以上颌第三磨牙发生率最高,下颌第一磨牙次之。最常发生的部位是在冠颈部的根分叉处,上颌磨牙的釉珠多呈园形,下颌磨牙釉珠多呈梭形。釉珠最大直径为3.2mm,最小为0.5mm,平均为1.56mm。结合文献认为釉珠是一种牙齿形态发育异常,它对牙周病的发生、发展、治疗与预后有重要影响,口腔科医师对这种牙齿形态变异应予以重视。 相似文献
15.
Naiquan Zheng Rafael F Escamilla Glenn S Fleisig Kevin E Wilk James R Andrews 《中华骨科杂志》2002,29(1):697-700
结果 髌股关节的压力与应力随膝关节屈曲角度的增加而升高,随膝关节屈曲角度的减小而降低(图3~8).不同膝关节屈曲角度下弓步变化和跨步变化的髌股关节压力见表1. 相似文献
16.
报告12例疸性腔皮病患者的性别与年龄构成、并发症、实验室检查、治疗经过和结果,对该病的病因、治疗和预后进行了讨论。 相似文献
17.
保留肾单位手术治疗早期小肾癌21例临床分析 总被引:1,自引:0,他引:1
Yao-Jun Xiao Shao-Bin Zheng Wan-Long Tan Tong Chen Huan Qi Zhi-Qiang Shao Yao-Dong Jiang Peng Wu Hui-Jian Zhang 《第一军医大学学报》2005,25(3):357-359
OBJECTIVE: To evaluate the clinical effects of nephron-sparing surgery in patients with early-stage small renal cell carcinoma. METHODS: Nephron-sparing surgery was performed in 21 patients with renal cell carcinoma including 1 with solitary kidney, 3 with unilateral tumor and contralateral renal compromise, and 17 with unilateral tumor and normal contralateral kidney. The diameter of the tumors ranged from 1.5 to 6.0 cm, with a mean of 2.8 cm. The tumor diameter in 17 patients with normal contralateral kidney was less than 4 cm (mean 2.5 cm) and the average diameter in 4 patients with contralateral renal compromise was 4.2 cm. Sixteen cases were in stage T(1), 4 in stage T(2), and 1 in stage T(3). Of the 21 patients, 4 underwent tumor enucleation, 10 polar nephrectomy and 7 wedge resection. RESULTS: All patients were followed up for an average of 40.8 months (7 to 66 months). One patient suffered a right lung and mediastinum metastasis 3 years after the surgery later and 1 with chronic glomerulonephritis required dialysis 27 months after the operation. No surgical complication or local recurrence were found in other patients. CONCLUSION: As a safe and effective therapy for early-stage small renal cell carcinoma, nephron-sparing surgery can be considered as the gold-standard therapy for patients with lesions less than 4 cm in T(1) and T(2) stages of localized unilateral tumor with normal contralateral kidney. 相似文献
18.
Lin Bo Wang Jian Guo Shen Li Feng Dong Chao Yang Xu Wen Jun Chen Shu Duo Xie Xiang Yang Song Ning Dai Xiao Ming Yuan 《Journal of gastrointestinal surgery》2008,12(8):1359-1363
We previously reported that lymphatic mapping using isosulfan blue can be used to identify sentinel nodes (SNs). This study
was undertaken to evaluate the feasibility of using the SN technique in treating early gastric cancer and to explore its usefulness
for minimal invasive surgery. Twenty-three patients with early gastric cancer who underwent SN biopsy were retrospectively
evaluated. Based on SN evaluation, individualized surgery was performed in five patients with T1N0M0 gastric cancer. When
pathological examination of frozen sections revealed metastasis in SNs, we performed a standard D2 gastrectomy. Laparoscopic
local resection was applied when the SN biopsy was negative. Our results showed that the success rate with SN biopsy in early
gastric cancer was 100%, as were the accuracy, sensitivity, and specificity. All five patients with early gastric cancer had
SNs negative for metastases both by frozen section and by postoperative pathology. Thus, all these patients underwent laparoscopic
local resection without extended lymphadenectomy. We conclude that SN biopsy is a useful tool to individualize the operative
procedure, and laparoscopic local resection can be safely performed using SN guidance in selected patients with early gastric
cancer. 相似文献
19.
Jing‐Ping Zhang Limin Zheng Jiang‐Hai Wang Karl‐Eric Magnusson Xin Liu 《Phytotherapy research : PTR》2009,23(6):844-850
Ganoderma sinensis has been used widely in Oriental countries for the prevention and treatment of various diseases including cancer. Previous studies have shown that the lipid extract from Ganoderma exhibits direct cytotoxicity against tumor cells. Here, it is reported that the lipid extract from germinating G. sinensis spores, at lower concentrations that have no direct tumoricidal activity, induce potent antitumor immune responses in human monocytes/macrophages. Upon stimulation with the lipid extract, monocytes/macrophages exhibited markedly increased production of proinflammatory cytokines and surface expression of costimulatory molecules. Conditioned medium from stimulated cells effectively suppressed the growth of tumor cells. Apparently, the lipid extract triggered macrophage activation via a mechanism different from that associated with LPS. Moreover, it was observed that the lipid extract could partially re‐establish the antitumor activity of the immunosuppressive tumor‐associated macrophages. These results indicated that in addition to its direct tumoricidal activity, the lipid extract from G. sinensis spores could exert antitumor activity by stimulating the activation of human monocytes/macrophages. Copyright © 2008 John Wiley & Sons, Ltd. 相似文献
20.
喉癌患者术后的适应性研究 总被引:2,自引:0,他引:2
喉癌是头颈部最常见的恶性肿瘤,目前手术仍是治疗喉癌的主要手段.通过对喉癌术后患者的适应状态、适应测量及影响适应的因素进行综述,提出对喉癌术后适应干预的研究应该针对患者的年龄与性别、个性特征提供不同的应对、治疗方式、术后时间、社会支持和信息等方面知识. 相似文献