全文获取类型
收费全文 | 3912篇 |
免费 | 182篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 40篇 |
儿科学 | 99篇 |
妇产科学 | 36篇 |
基础医学 | 297篇 |
口腔科学 | 71篇 |
临床医学 | 222篇 |
内科学 | 1064篇 |
皮肤病学 | 148篇 |
神经病学 | 193篇 |
特种医学 | 86篇 |
外科学 | 824篇 |
综合类 | 16篇 |
预防医学 | 66篇 |
眼科学 | 116篇 |
药学 | 150篇 |
1篇 | |
中国医学 | 3篇 |
肿瘤学 | 686篇 |
出版年
2024年 | 11篇 |
2023年 | 57篇 |
2022年 | 98篇 |
2021年 | 156篇 |
2020年 | 87篇 |
2019年 | 96篇 |
2018年 | 111篇 |
2017年 | 117篇 |
2016年 | 138篇 |
2015年 | 131篇 |
2014年 | 163篇 |
2013年 | 197篇 |
2012年 | 292篇 |
2011年 | 317篇 |
2010年 | 170篇 |
2009年 | 136篇 |
2008年 | 192篇 |
2007年 | 247篇 |
2006年 | 239篇 |
2005年 | 228篇 |
2004年 | 190篇 |
2003年 | 201篇 |
2002年 | 186篇 |
2001年 | 34篇 |
2000年 | 30篇 |
1999年 | 38篇 |
1998年 | 39篇 |
1997年 | 24篇 |
1996年 | 19篇 |
1995年 | 21篇 |
1994年 | 21篇 |
1993年 | 11篇 |
1992年 | 10篇 |
1991年 | 12篇 |
1990年 | 12篇 |
1989年 | 15篇 |
1988年 | 9篇 |
1987年 | 8篇 |
1986年 | 9篇 |
1985年 | 6篇 |
1984年 | 5篇 |
1983年 | 6篇 |
1982年 | 5篇 |
1981年 | 2篇 |
1980年 | 2篇 |
1978年 | 2篇 |
1977年 | 4篇 |
1976年 | 3篇 |
1973年 | 2篇 |
1971年 | 4篇 |
排序方式: 共有4118条查询结果,搜索用时 15 毫秒
1.
Yuichiro Nakai MD DMSc Takeshi Maeda MD Junko Nishio MD DMSc Daisuke Tachibana MD Motoharu Imanaka MD DMSc Sachio Ogita MD DMSc 《The Australian & New Zealand journal of obstetrics & gynaecology》1998,38(4):469-471
EDITORIAL COMMENT: We accepted this case for publication to remind readers that although uterine rupture during labour in a primigravida is extremely uncommon it does occur, or at any rate nulliparas can develop abdominal pain and shock in labour with a haemoperitoneum resulting from a tear in a vein in the lower posterior uterine wall. When one sees the hugely dilated uterine and ovarian venous plexuses at Caesarean section it is easy to believe that bleeding from such a vessel during labour could be prodigious. This case suggests that a dilated vein with blood flow derangements may be the cause. Nonetheless, as the authors warn us, the necessary response is not a precise diagnosis, but rapid laparotomy. See also Editorial Comment to Chin MMS, Harvey JA, Duffy BL. Uterine rupture during labour in a primigravida. Aust NZ J Obstet Gynaecol 1996; 36: 210. 相似文献
2.
Tsutomu Yasutake Daisuke Nagatomo Toshihiko Mizuta Yuichiro Eguchi Takanori Kumagai Keisuke Ario Iwata Ozaki Tateo Kuno Kazuma Fujimoto 《Nihon Shokakibyo Gakkai zasshi》2007,104(12):1752-1757
A 16-year-old man was admitted to our hospital with nausea, general fatigue, and consciousness disturbance along with extreme hyperammoniemia eight days after the onset of symptoms. Familial history and the high concentration of orotic acid in urine lead us to a diagnosis of OTCD. We immediately initiated intensive treatment such as continuous hemodiafiltration and sodium benzoate administration; however, the patient died twelve days after admission. Since OTCD is not so rare and can be found in all ages, it should be considered fundamental for evaluation of hyperammoniemia. This case suggested that for a better prognosis of OTCD patients it is very important to prevent such an onset, and to make an as early as possible diagnosis and start to treatment. 相似文献
3.
Eri Ogawa Yuichiro Otsubo Norihiro Taira Nihal S. Agar 《Comparative clinical pathology》2005,13(3):137-141
Uptake of dehydroascorbic acid (DHA) was studied in two types of dog erythrocytes with high GSH and normal GSH levels. Compared with ascorbic acid uptake, DHA produced a much greater ascorbic acid accumulation in dog erythrocytes. Both dog erythrocytes showed a concentration dependence of DHA uptake, and cellular ascorbic acid concentrations were significantly higher in high-GSH cells than in normal-GSH cells. Glucose and cytochalasin B inhibited DHA uptake. This suggests that DHA enters dog erythrocytes predominantly by the facilitated glucose transporter, particularly by the Glut 1 glucose transporter. The rate of glucose uptake was quite similar in the two types of cells. Compared with normal-GSH cells, high-GSH cells were more resistant to oxidative stress induced by high concentration of DHA. As a rapid entry of DHA inflicts on cells a heavy demand for GSH for its reduction to ascorbic acid, high-GSH cells containing a larger reserve of GSH have an advantage over normal-GSH cells in both ascorbic acid accumulation and resisting oxidative stress produced by DHA. 相似文献
4.
5.
Sadahisa Okamoto Yuichiro Inatomi Toshiro Yonehara Yoichiro Hashimoto Teruyuki Hirano Makoto Uchino 《Clinical neurology》2006,46(5):307-311
In order to determine predictive factors of early seizures (ES) after acute stroke and to estimate prognosis, we retrospectively examined clinical data of 1,743 consecutive patients with acute ischemic stroke. The subjects were divided into two groups; an ES group (19 patients) and a non-ES group (1,724 patients). Multivariate statistical analysis revealed that the NIH-Stroke Scale score on admission (/10, OR, 1.1: 95% CI 1.04 to 1.13) and positive past history of cerebrovascular disease or brain injury (OR, 3.85: 95% CI 1.49 to 9.95) are significant factors to predict ES. There was no significant difference in the outcome between the two groups. A recurrence of seizures, after follow up for 4 to 40 months, was observed only in one patient with a history of ES. 相似文献
6.
7.
8.
Yoshio Takesue Takashi Yokoyama Takashi Kodama Yoshiaki Murakami Yuji Imamura Yuichiro Matsuura 《Surgery today》1997,27(5):392-397
This study was designed to determine the influence of ileal pouch capacity and anal sphincteric function on the clinical outcome
after ileal pouch-anal anastomosis. A total of 24 patients who had undergone ileal pouch-anal anastomosis (J pouch) for ulcerative
colitis were studied. The 24-hour stool frequency was found to be inversely correlated with the sensitivity threshold volume
(STV), maximal tolerance volume (MTV), and distensibility, but was independent of the maximal resting pressure and maximal
squeeze pressure. Patients experiencing nocturnal fecal incontinence had maximal resting pressures that were significantly
lower than those of nocturnally continent patients. Among the patients with fecal incontinence, those with frequent soiling
had lower resting pressures, STV, and distensibility than the patients with intermittent spotting. In addition, the STV in
patients needing nocturnal evacuation were lower than those of patients who did not evacuate after falling asleep. The conclusions
are as follows. Both stool frequency and the need for nocturnal pouch evacuation correlated directly with pouch volume. Anal
incontinence was more common in patients with low internal sphincteric function. In addition, frequent and gross nocturnal
incontinent patients demonstrate a worse function in both the anal sphincter and reservoir than those with intermittent spotting. 相似文献
9.
Leiomyosarcoma originating in Meckel's diverticulum: Report of a case and a review of 59 cases in the English literature 总被引:1,自引:0,他引:1
Nobuyuki Shimizu Shu Kuramoto Toshiki Mimura Kaoru Kobayashi Masanori Kobayashi Shigeru Sakai Michio Kaminishi Takeshi Oohara 《Surgery today》1997,27(6):546-549
A 49-year-old woman was referred to our hospital with complaints of epigastric colicky pain and high fever. Abdominal computed
tomography and ultrasonography showed a solid tumor in the lower abdomen. Laparotomy revealed a neoplastic mass arising in
Meckel's diverticulum; therefore, a segment of the ileum, including the tumor-possessing diverticulum, was resected with a
lymph node dissection. A histologic examination confirmed the lesion to be leiomyosarcoma. In the English literature, 59 cases
of leiomyosarcoma in Meckel's diverticulum were reported from 1941 to 1994. The majority of patients were in their 4th decade
of life, with both sexes equally affected. The most frequent symptoms associated with this disease were abdominal pain with
nausea, vomiting, and melena. The majority were larger than egg-size. Although Meckel's diverticulum is difficult to diagnose
preoperatively, mesenteric arteriography may at times prove useful. The standard management of this particular tumor is wide
segmental resection, including the tumor and diverticulum with lymph node dissection. 相似文献
10.
Kagayaki Kuroda Daisuke Kokuryo Etsuko Kumamoto Kyohei Suzuki Yuichiro Matsuoka Bilgin Keserci 《Magnetic resonance in medicine》2006,56(4):835-843
Referenceless, or self-reference, thermometry is a technique for mapping temperature differences in the region of interest (ROI) using the baseline phase estimated by extrapolating the field in the surrounding region for estimation (RFE) and subtracting the estimated baseline from the measured field. In the present work a self-reference technique based on complex field estimation using 2D polynomials comprising complex-valued coefficients was proposed and optimized. Numerical simulations with a Gaussian-profiled phase distribution demonstrated that the ROI radius had to be 2.3-2.5 times the standard deviation (SD) of the Gaussian function in order to keep the error below 8% of the peak phase change. The area ratio between the ROI and the RFE had to be larger than 2.0 to maintain the error level. Based on the simulations, and phantom and volunteer experiments, the complex-based method with independently optimized polynomial orders for the two spatial dimensions was compared with the phase-based method using the similar-order optimization strategy. The complex-based method appeared to be useful when phase unwrapping was not removed. Otherwise, the phase-based method yielded equivalent results with less polynomial orders. 相似文献