首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   9681篇
  免费   555篇
  国内免费   8篇
耳鼻咽喉   13篇
儿科学   165篇
妇产科学   112篇
基础医学   1215篇
口腔科学   63篇
临床医学   876篇
内科学   1531篇
皮肤病学   93篇
神经病学   206篇
特种医学   295篇
外科学   770篇
综合类   51篇
预防医学   359篇
眼科学   19篇
药学   273篇
中国医学   4篇
肿瘤学   4199篇
  2023年   397篇
  2022年   436篇
  2021年   529篇
  2020年   648篇
  2019年   424篇
  2018年   405篇
  2017年   314篇
  2016年   239篇
  2015年   268篇
  2014年   602篇
  2013年   443篇
  2012年   456篇
  2011年   422篇
  2010年   412篇
  2009年   348篇
  2008年   326篇
  2007年   336篇
  2006年   293篇
  2005年   312篇
  2004年   283篇
  2003年   298篇
  2002年   245篇
  2001年   224篇
  2000年   182篇
  1999年   155篇
  1998年   111篇
  1997年   100篇
  1996年   84篇
  1995年   56篇
  1994年   54篇
  1993年   51篇
  1992年   154篇
  1991年   135篇
  1990年   134篇
  1989年   142篇
  1988年   116篇
  1987年   43篇
  1986年   14篇
  1985年   17篇
  1984年   28篇
  1983年   7篇
  1966年   1篇
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
《Clinical colorectal cancer》2021,20(4):e273-e278
BackgroundFew studies have compared the survival outcomes of stages II and IIIA rectal cancer patients who did not receive neoadjuvant treatment. This study aimed to compare oncologic outcomes between 2 groups.Patients and MethodsThis study analyzed stage II or IIIA rectal cancer patients who underwent radical operation without neoadjuvant treatment between 1996 and 2013. The 3:1 propensity score analysis was used to adjust for several variables. After propensity score matching, 364 stage II rectal cancer, and 172 stage IIIA rectal cancer patients were analyzed.ResultsThere were no significant differences in 5-year overall survival or disease-free survival rates between the 2 groups. When stage II rectal cancer was subdivided into stages IIA, IIB, and IIC, the 5-year DFS and OS rates of stage IIIA rectal cancer patients were similar to those of stage IIA cancer patients. Moreover, stage IIIA rectal cancer patients showed a statistically significantly better survival rates than stage IIC rectal cancer patients.ConclusionStage IIIA group showed similar survival outcomes compared to stage IIA and IIB group and significantly better outcomes than stage IIC group. Thus, it should be considered to classify stage IIIA as a subgroup of stage II rather than as a subgroup of stage III rectal cancer. It should be also be considered to change to determine whether to do adjuvant treatment according to stage II rectal cancer.  相似文献   
4.
5.
IntroductionPembrolizumab has shown clinical benefit in patients with previously treated recurrent or metastatic SCLC in the phase 1b multicohort study KEYNOTE-028 (NCT02054806) and the phase 2 multicohort study KEYNOTE-158 (NCT02628067). We present a pooled analysis of patients from KEYNOTE-028 and KEYNOTE-158 who had received two or more lines of previous therapy for SCLC.MethodsEligible patients were aged 18 years and above, had histologically or cytologically confirmed incurable recurrent or metastatic SCLC, had an Eastern Cooperative Oncology Group performance status of 1 and below, and had received two or more lines of previous therapy. Patients in KEYNOTE-028 were required to have a programmed death ligand 1 (PD-L1)–positive tumor. Patients received pembrolizumab (10 mg/kg every 2 weeks in KEYNOTE-028 or 200 mg every 3 weeks in KEYNOTE-158) for up to 2 years. The primary end point was objective response rate per Response Evaluation Criteria in Solid Tumors version 1.1, which is presented here per independent review.ResultsEighty-three patients who had received two or more lines of previous therapy (KEYNOTE-028, n = 19; KEYNOTE-158, n = 64) were included. Median follow-up duration was 7.7 (range, 0.5–48.7) months. Objective response rate was 19.3% (95% confidence interval: 11.4–29.4); two patients had complete response (one with a PD-L1–positive tumor), and 14 patients had partial response (13 with PD-L1–positive tumors). The median duration of response was not reached (range, 4.1‒35.8+ mo; plus sign indicates ongoing response); 61% of responders had responses lasting 18 months or longer. Fifty-one patients (61.4%) experienced any-grade treatment-related adverse events; eight patients (9.6%) had grade 3 or higher events.ConclusionsPembrolizumab exhibited durable antitumor activity in a subset of patients with recurrent or metastatic SCLC who had undergone two or more previous lines of therapy, regardless of PD-L1 expression. Pembrolizumab was well tolerated.  相似文献   
6.
7.
8.
There is a large and growing population of long-term cancer survivors. Primary care physicians (PCPs) are playing an increasingly greater role in the care of these patients across the continuum of cancer survivorship. In this role, PCPs are faced with the responsibility of managing a range of medical and psychosocial late effects of cancer treatment. In particular, the sexual side effects of treatment which are common and have significant impact on quality of life for the cancer survivor, often go unaddressed. This is an area of clinical care and research that has received increasing attention, highlighted by the presentation of this special issue on Cancer and Sexual Health. The aims of this review are 3-fold. First, we seek to overview common presentations of sexual dysfunction related to major cancer diagnoses in order to give the PCP a sense of the medical issues that the survivor may present with. Barriers to communication about sexual health issues between patient/PCPs in order are also described in order to emphasize the importance of PCPs initiating this important conversation. Next, we provide strategies and resources to help guide the PCP in the management of sexual dysfunction in cancer survivors. Finally, we discuss case examples of survivorship sexual health issues and highlight the role that a PCP can play in each of these case examples.  相似文献   
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号