全文获取类型
收费全文 | 6396篇 |
免费 | 461篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 49篇 |
儿科学 | 201篇 |
妇产科学 | 155篇 |
基础医学 | 690篇 |
口腔科学 | 97篇 |
临床医学 | 947篇 |
内科学 | 1274篇 |
皮肤病学 | 64篇 |
神经病学 | 588篇 |
特种医学 | 132篇 |
外科学 | 994篇 |
综合类 | 93篇 |
一般理论 | 27篇 |
预防医学 | 701篇 |
眼科学 | 63篇 |
药学 | 375篇 |
中国医学 | 9篇 |
肿瘤学 | 413篇 |
出版年
2023年 | 70篇 |
2022年 | 92篇 |
2021年 | 296篇 |
2020年 | 138篇 |
2019年 | 257篇 |
2018年 | 278篇 |
2017年 | 166篇 |
2016年 | 157篇 |
2015年 | 158篇 |
2014年 | 227篇 |
2013年 | 323篇 |
2012年 | 431篇 |
2011年 | 479篇 |
2010年 | 226篇 |
2009年 | 206篇 |
2008年 | 337篇 |
2007年 | 312篇 |
2006年 | 276篇 |
2005年 | 289篇 |
2004年 | 263篇 |
2003年 | 219篇 |
2002年 | 196篇 |
2001年 | 86篇 |
2000年 | 79篇 |
1999年 | 54篇 |
1998年 | 50篇 |
1997年 | 39篇 |
1996年 | 41篇 |
1995年 | 39篇 |
1994年 | 23篇 |
1993年 | 26篇 |
1992年 | 65篇 |
1991年 | 68篇 |
1990年 | 78篇 |
1989年 | 58篇 |
1988年 | 50篇 |
1987年 | 67篇 |
1986年 | 69篇 |
1985年 | 36篇 |
1984年 | 34篇 |
1983年 | 37篇 |
1982年 | 29篇 |
1981年 | 25篇 |
1979年 | 48篇 |
1978年 | 30篇 |
1977年 | 26篇 |
1976年 | 25篇 |
1973年 | 23篇 |
1971年 | 22篇 |
1969年 | 20篇 |
排序方式: 共有6872条查询结果,搜索用时 15 毫秒
91.
Ming Zhenping Gong Ai-Yu Wang Yang Zhang Xin-Tian Li Min Dolata Courtney E. Chen Xian-Ming 《Parasitology research》2018,117(3):831-840
Parasitology Research - To counteract host immunity, Cryptosporidium parvum has evolved multiple strategies to suppress host antimicrobial defense. One such strategy is to reduce the production of... 相似文献
92.
93.
94.
95.
César Fernández-de-las-Pe?as Carol A Courtney 《Journal of Manual and Manipulative Therapy》2014,22(1):44-50
In recent years, there has been an increasing knowledge in the pathogenesis and better management of chronic headaches. Current scientific evidence supports the role of manual therapies in the management of tension type and cervicogenic headache, but the results are still conflicting. These inconsistent results can be related to the fact that maybe not all manual therapies are appropriate for all types of headaches; or maybe not all patients with headache will benefit from manual therapies. There are preliminary data suggesting that patients with a lower degree of sensitization will benefit to a greater extent from manual therapies, although more studies are needed. In fact, there is evidence demonstrating the presence of peripheral and central sensitization in chronic headaches, particularly in tension type. Clinical management of patients with headache needs to extend beyond local tissue-based pathology, to incorporate strategies directed at normalizing central nervous system sensitivity. In such a scenario, this paper exposes some examples of manual therapies for tension type and cervicogenic headache, based on a nociceptive pain rationale, for modulating central nervous system hypersensitivity: trigger point therapy, joint mobilization, joint manipulation, exercise, and cognitive pain approaches. 相似文献
96.
97.
Eva V George John Pharm Courtney Houston Semar Al-Quran Grey Brian Huijia Dong Wang Hai Westley Reeves Li-Jun Yang 《International journal of clinical and experimental pathology》2013,6(8):1631-1642
Breast implant associated anaplastic large cell lymphoma (BIA-ALCL) is a recently recognized clinical entity, with only 39 well-documented cases reported worldwide, including 3 fatalities. Because of its rarity, the clinical and pathologic features of this malignancy have yet to be fully defined. Moreover, the pathogenesis of ALCL in association with textured silicone gel breast implants is poorly understood. Here we report a case of BIA-ALCL arising in a 67-year-old woman with a mastectomy due to breast cancer followed by implantation of textured silicone gel breast prosthesis. The patient presented with breast enlargement and tenderness 8 years following reconstructive surgery. MRI revealed a fluid collection surrounding the affected breast implant. Pathologic examination confirmed the presence of malignant ALCL T cells that were CD30+, CD8+, CD15+, HLA-DR+, CD25+ ALK- and p53. A diagnosis of indolent BIA-ALCL was made since tumor cells were not found outside of the capsule. Interestingly, an extensive mixed lymphocytic infiltrate and ectopic lymphoid tissue (lymphoid neogenesis) adjacent to the fibrous implant capsule were present. The patient was treated with capsulectomy and implantation of new breast prostheses. Six months later, the patient was found to have BIA-ALCL involvement of an axillary lymph node with cytogenetic evolutionof the tumor. To our knowledge, this is the sixth reported case of aggressive BIA-ALCL. Unique features of this case include the association with lymphoid neogenesis and the in vivo cytogenetic progression of the tumor. This case provides insight into the potential role of chronic inflammation and genetic instability in the pathogenesis of BIA-ALCL. 相似文献
98.
99.
This study tested a brief, Web-based personalized feedback program aimed at reducing alcohol use and alcohol-related consequences among 9th grade students (N = 513). Results indicated no differences between the control group and intervention group on either frequency of drinking or alcohol-related consequences at the 6-month follow-up. Reductions in alcohol use and the associated consequences found at the 3-month follow-up were not sustained across the academic year. Results indicate that brief, Web-based feedback programs may not be sufficient to provide a sustained impact on alcohol use and alcohol-related consequences over time, suggesting either booster sessions or adjunctive interventions, such as parent-based interventions, may be warranted for this age group. 相似文献
100.
Courtney A. Marsh Matthew A. Will Noam Smorgick Elisabeth H. Quint Hero Hussain Yolanda R. Smith 《Journal of pediatric and adolescent gynecology》2013,26(3):199-202
ObjectiveTo assess the association between pelvic pain and uterine remnants and review the management of pelvic pain in females with Mayer-Rokitansky-Küster-Hauser (MRKH) syndrome.DesignRetrospective cohort.SettingDepartment of Obstetrics and Gynecology at a tertiary referring medical center.PatientsForty-eight females with MRKH presenting from 1997 to 2011 with anatomy confirmed by magnetic resonance imaging (MRI).InterventionsNone.Main Outcome MeasurePrevalence Of uterine remnants and the association of uterine remnants with pelvic pain in females with MRKH.ResultsOf the 48 females with MRKH, 23 (48%) had uterine remnants and 22 (46%) had pelvic pain. Presence of endometrium was associated with pelvic pain (RR = 2.3; 95% CI = 1.2-4.7) in females with MRKH. Of the females with MKRH and pain, 9/22 had laparoscopy, with endometriosis seen in 5/9 of the uterine remnants at stages higher than are usually seen in teenagers (56%). Nine patients with pain and uterine remnants (8 with endometrium, 1 without) had laparoscopic removal of uterine remnants with resolution of pain.ConclusionsGiven the high prevalence of uterine remnants in females with MRKH, anatomic evaluation with MRI should be considered when assessing the etiology of pelvic pain. Presence of endometrium within uterine remnants, and subsequent endometriosis, in females with MRKH may be associated with pelvic pain necessitating surgical or medical management. 相似文献